31451976228 has 12 divisors (see below), whose sum is σ = 73387944560. Its totient is φ = 10483992072.

The previous prime is 31451976223. The next prime is 31451976271. The reversal of 31451976228 is 82267915413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×31451976228³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31451976223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310498998 + ... + 1310499021.

Almost surely, 2^31451976228 is an apocalyptic number.

It is an amenable number.

31451976228 is an abundant number, since it is smaller than the sum of its proper divisors (41935968332).

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

31451976228 is a wasteful number, since it uses less digits than its factorization.

31451976228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620998026 (or 2620998024 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 31451976228 in words is "thirty-one billion, four hundred fifty-one million, nine hundred seventy-six thousand, two hundred twenty-eight".