3157479021 has 8 divisors (see below), whose sum is σ = 4212879264. Its totient is φ = 2103532400.

The previous prime is 3157478977. The next prime is 3157479079. The reversal of 3157479021 is 1209747513.

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

It is a cyclic number.

It is not a de Polignac number, because 3157479021 - 2¹⁰ = 3157477997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3157379021) 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, 358326 + ... + 367031.

It is an arithmetic number, because the mean of its divisors is an integer number (526609908).

Almost surely, 2^3157479021 is an apocalyptic number.

It is an amenable number.

3157479021 is a deficient number, since it is larger than the sum of its proper divisors (1055400243).

3157479021 is a wasteful number, since it uses less digits than its factorization.

3157479021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726811.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 3157479021 is about 56191.4497143471. The cubic root of 3157479021 is about 1467.0564480956.

The spelling of 3157479021 in words is "three billion, one hundred fifty-seven million, four hundred seventy-nine thousand, twenty-one".