31229420136 has 16 divisors (see below), whose sum is σ = 78073550400. Its totient is φ = 10409806704.

The previous prime is 31229420113. The next prime is 31229420147. The reversal of 31229420136 is 63102492213.

It is a junction number, because it is equal to n+sod(n) for n = 31229420097 and 31229420106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650612896 + ... + 650612943.

It is an arithmetic number, because the mean of its divisors is an integer number (4879596900).

Almost surely, 2^31229420136 is an apocalyptic number.

It is an amenable number.

31229420136 is an abundant number, since it is smaller than the sum of its proper divisors (46844130264).

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

31229420136 is a wasteful number, since it uses less digits than its factorization.

31229420136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301225848 (or 1301225844 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 31229420136 in words is "thirty-one billion, two hundred twenty-nine million, four hundred twenty thousand, one hundred thirty-six".