331022220156 has 30 divisors (see below), whose sum is σ = 865357471440. Its totient is φ = 110340739944.

The previous prime is 331022220131. The next prime is 331022220157. The reversal of 331022220156 is 651022220133.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331022220157) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 510836436 + ... + 510837083.

It is an arithmetic number, because the mean of its divisors is an integer number (28845249048).

Almost surely, 2^331022220156 is an apocalyptic number.

331022220156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

331022220156 is an abundant number, since it is smaller than the sum of its proper divisors (534335251284).

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

331022220156 is a wasteful number, since it uses less digits than its factorization.

331022220156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021673535 (or 1021673524 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 331022220156 its reverse (651022220133), we get a palindrome (982044440289).

The spelling of 331022220156 in words is "three hundred thirty-one billion, twenty-two million, two hundred twenty thousand, one hundred fifty-six".