31421108236 has 24 divisors (see below), whose sum is σ = 62967179520. Its totient is φ = 13439411472.

The previous prime is 31421108183. The next prime is 31421108249. The reversal of 31421108236 is 63280112413.

It is a junction number, because it is equal to n+sod(n) for n = 31421108198 and 31421108207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101406 + ... + 1129573.

It is an arithmetic number, because the mean of its divisors is an integer number (2623632480).

Almost surely, 2^31421108236 is an apocalyptic number.

It is an amenable number.

31421108236 is an abundant number, since it is smaller than the sum of its proper divisors (31546071284).

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

31421108236 is a wasteful number, since it uses less digits than its factorization.

31421108236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231493 (or 2231491 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 31421108236 in words is "thirty-one billion, four hundred twenty-one million, one hundred eight thousand, two hundred thirty-six".