315200143521 has 12 divisors (see below), whose sum is σ = 482070807972. Its totient is φ = 197772638976.

The previous prime is 315200143499. The next prime is 315200143523. The reversal of 315200143521 is 125341002513.

315200143521 is a `hidden beast` number, since 3 + 1 + 5 + 200 + 1 + 435 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 194071086225 + 121129057296 = 440535^2 + 348036^2 .

It is not a de Polignac number, because 315200143521 - 2²¹ = 315198046369 is a prime.

It is a super-2 number, since 2×315200143521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (315200143523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1030065676 + ... + 1030065981.

It is an arithmetic number, because the mean of its divisors is an integer number (40172567331).

Almost surely, 2^315200143521 is an apocalyptic number.

It is an amenable number.

315200143521 is a deficient number, since it is larger than the sum of its proper divisors (166870664451).

315200143521 is a wasteful number, since it uses less digits than its factorization.

315200143521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060131680 (or 2060131677 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 315200143521 in words is "three hundred fifteen billion, two hundred million, one hundred forty-three thousand, five hundred twenty-one".