31220316162 has 160 divisors (see below), whose sum is σ = 86457051648. Its totient is φ = 8216515584.

The previous prime is 31220316133. The next prime is 31220316181. The reversal of 31220316162 is 26161302213.

31220316162 is a `hidden beast` number, since 3 + 12 + 2 + 0 + 31 + 616 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 888838 + ... + 923294.

Almost surely, 2^31220316162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31220316162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43228525824).

31220316162 is an abundant number, since it is smaller than the sum of its proper divisors (55236735486).

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

31220316162 is a wasteful number, since it uses less digits than its factorization.

31220316162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34542 (or 34533 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 31220316162 its reverse (26161302213), we get a palindrome (57381618375).

The spelling of 31220316162 in words is "thirty-one billion, two hundred twenty million, three hundred sixteen thousand, one hundred sixty-two".