31621601213352 has 96 divisors (see below), whose sum is σ = 87465897492480. Its totient is φ = 10316043653760.

The previous prime is 31621601213317. The next prime is 31621601213413. The reversal of 31621601213352 is 25331210612613.

31621601213352 is a `hidden beast` number, since 3 + 1 + 6 + 2 + 1 + 601 + 2 + 13 + 35 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241189977 + ... + 241321047.

It is an arithmetic number, because the mean of its divisors is an integer number (911103098880).

Almost surely, 2^{31621601213352} is an apocalyptic number.

It is an amenable number.

31621601213352 is an abundant number, since it is smaller than the sum of its proper divisors (55844296279128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31621601213352 is a wasteful number, since it uses less digits than its factorization.

31621601213352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202423 (or 202416 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 31621601213352 its reverse (25331210612613), we get a palindrome (56952811825965).

The spelling of 31621601213352 in words is "thirty-one trillion, six hundred twenty-one billion, six hundred one million, two hundred thirteen thousand, three hundred fifty-two".