401521315970 has 16 divisors (see below), whose sum is σ = 730189281528. Its totient is φ = 158952768000.

The previous prime is 401521315957. The next prime is 401521315973. The reversal of 401521315970 is 79513125104.

It can be written as a sum of positive squares in 4 ways, for example, as 314116532521 + 87404783449 = 560461^2 + 295643^2 .

It is a super-2 number, since 2×401521315970² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401521315973) 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, 206968781 + ... + 206970720.

Almost surely, 2^401521315970 is an apocalyptic number.

401521315970 is a deficient number, since it is larger than the sum of its proper divisors (328667965558).

401521315970 is a wasteful number, since it uses less digits than its factorization.

401521315970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413939605.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 401521315970 in words is "four hundred one billion, five hundred twenty-one million, three hundred fifteen thousand, nine hundred seventy".