3125321531 has 4 divisors (see below), whose sum is σ = 3309163992. Its totient is φ = 2941479072.

The previous prime is 3125321527. The next prime is 3125321539. The reversal of 3125321531 is 1351235213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1351235213 = 2749 ⋅491537.

It is a cyclic number.

It is not a de Polignac number, because 3125321531 - 2² = 3125321527 is a prime.

It is a super-2 number, since 2×3125321531² = 19535269344264367922, 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 3125321531.

It is not an unprimeable number, because it can be changed into a prime (3125321539) 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, 91921205 + ... + 91921238.

It is an arithmetic number, because the mean of its divisors is an integer number (827290998).

Almost surely, 2^3125321531 is an apocalyptic number.

3125321531 is a deficient number, since it is larger than the sum of its proper divisors (183842461).

3125321531 is a wasteful number, since it uses less digits than its factorization.

3125321531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183842460.

The product of its digits is 2700, while the sum is 26.

The square root of 3125321531 is about 55904.5752242158. The cubic root of 3125321531 is about 1462.0590093787.

Adding to 3125321531 its reverse (1351235213), we get a palindrome (4476556744).

The spelling of 3125321531 in words is "three billion, one hundred twenty-five million, three hundred twenty-one thousand, five hundred thirty-one".