3152840721 has 8 divisors (see below), whose sum is σ = 4214595840. Its totient is φ = 2096489712.

The previous prime is 3152840681. The next prime is 3152840729. The reversal of 3152840721 is 1270482513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3152840721 - 2¹⁵ = 3152807953 is a prime.

It is a super-2 number, since 2×3152840721² = 19880809223991599682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3152840729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349665 + ... + 1351998.

It is an arithmetic number, because the mean of its divisors is an integer number (526824480).

Almost surely, 2^3152840721 is an apocalyptic number.

It is an amenable number.

3152840721 is a deficient number, since it is larger than the sum of its proper divisors (1061755119).

3152840721 is a wasteful number, since it uses less digits than its factorization.

3152840721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702055.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 3152840721 is about 56150.1622526596. The cubic root of 3152840721 is about 1466.3377330930.

The spelling of 3152840721 in words is "three billion, one hundred fifty-two million, eight hundred forty thousand, seven hundred twenty-one".