3132313021 has 4 divisors (see below), whose sum is σ = 3132667552. Its totient is φ = 3131958492.

The previous prime is 3132313007. The next prime is 3132313043. The reversal of 3132313021 is 1203132313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1203132313 = 17 ⋅70772489.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3132313021 is a prime.

It is a super-2 number, since 2×3132313021² = 19622769723052292882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3132313021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3132313321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163665 + ... + 181798.

It is an arithmetic number, because the mean of its divisors is an integer number (783166888).

Almost surely, 2^3132313021 is an apocalyptic number.

It is an amenable number.

3132313021 is a deficient number, since it is larger than the sum of its proper divisors (354531).

3132313021 is an equidigital number, since it uses as much as digits as its factorization.

3132313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354530.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3132313021 is about 55967.0708631424. The cubic root of 3132313021 is about 1463.1484288149.

Adding to 3132313021 its reverse (1203132313), we get a palindrome (4335445334).

It can be divided in two parts, 31323 and 13021, that added together give a palindrome (44344).

The spelling of 3132313021 in words is "three billion, one hundred thirty-two million, three hundred thirteen thousand, twenty-one".