315051621 has 16 divisors (see below), whose sum is σ = 441048000. Its totient is φ = 199761408.

The previous prime is 315051619. The next prime is 315051629. The reversal of 315051621 is 126150513.

It is not a de Polignac number, because 315051621 - 2¹ = 315051619 is a prime.

It is a super-4 number, since 4×315051621⁴ (a number of 35 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315051591 and 315051600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315051629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21196 + ... + 32853.

It is an arithmetic number, because the mean of its divisors is an integer number (27565500).

Almost surely, 2^315051621 is an apocalyptic number.

It is an amenable number.

315051621 is a deficient number, since it is larger than the sum of its proper divisors (125996379).

315051621 is a wasteful number, since it uses less digits than its factorization.

315051621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54148.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 315051621 is about 17749.6935466503. The cubic root of 315051621 is about 680.4463771884.

The spelling of 315051621 in words is "three hundred fifteen million, fifty-one thousand, six hundred twenty-one".