401216117522 has 24 divisors (see below), whose sum is σ = 672353656716. Its totient is φ = 179381268000.

The previous prime is 401216117509. The next prime is 401216117593. The reversal of 401216117522 is 225711612104.

It can be written as a sum of positive squares in 2 ways, for example, as 302028284041 + 99187833481 = 549571^2 + 314941^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13574729 + ... + 13604252.

Almost surely, 2^401216117522 is an apocalyptic number.

401216117522 is a deficient number, since it is larger than the sum of its proper divisors (271137539194).

401216117522 is a wasteful number, since it uses less digits than its factorization.

401216117522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27179066 (or 27179055 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 401216117522 its reverse (225711612104), we get a palindrome (626927729626).

The spelling of 401216117522 in words is "four hundred one billion, two hundred sixteen million, one hundred seventeen thousand, five hundred twenty-two".