31128891150 has 96 divisors (see below), whose sum is σ = 92064250368. Its totient is φ = 6805814400.

The previous prime is 31128891137. The next prime is 31128891161. The reversal of 31128891150 is 5119882113.

It is a junction number, because it is equal to n+sod(n) for n = 31128891099 and 31128891108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 620341 + ... + 668640.

It is an arithmetic number, because the mean of its divisors is an integer number (959002608).

Almost surely, 2^31128891150 is an apocalyptic number.

31128891150 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31128891150 is an abundant number, since it is smaller than the sum of its proper divisors (60935359218).

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

31128891150 is a wasteful number, since it uses less digits than its factorization.

31128891150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289026 (or 1289021 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 39.

The spelling of 31128891150 in words is "thirty-one billion, one hundred twenty-eight million, eight hundred ninety-one thousand, one hundred fifty".