315621157 has 8 divisors (see below), whose sum is σ = 337377600. Its totient is φ = 294534240.

The previous prime is 315621151. The next prime is 315621169. The reversal of 315621157 is 751126513.

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 315621157 - 2¹⁹ = 315096869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315621151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166407 + ... + 168292.

It is an arithmetic number, because the mean of its divisors is an integer number (42172200).

Almost surely, 2^315621157 is an apocalyptic number.

It is an amenable number.

315621157 is a deficient number, since it is larger than the sum of its proper divisors (21756443).

315621157 is a wasteful number, since it uses less digits than its factorization.

315621157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334763.

The product of its digits is 6300, while the sum is 31.

The square root of 315621157 is about 17765.7298470961. The cubic root of 315621157 is about 680.8561570376.

The spelling of 315621157 in words is "three hundred fifteen million, six hundred twenty-one thousand, one hundred fifty-seven".