31119930 has 32 divisors (see below), whose sum is σ = 82987200. Its totient is φ = 8298576.

The previous prime is 31119919. The next prime is 31119941. The reversal of 31119930 is 3991113.

It is an interprime number because it is at equal distance from previous prime (31119919) and next prime (31119941).

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

It is a junction number, because it is equal to n+sod(n) for n = 31119894 and 31119903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57360 + ... + 57899.

It is an arithmetic number, because the mean of its divisors is an integer number (2593350).

Almost surely, 2^31119930 is an apocalyptic number.

31119930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31119930 is an abundant number, since it is smaller than the sum of its proper divisors (51867270).

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

31119930 is a wasteful number, since it uses less digits than its factorization.

31119930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115275 (or 115269 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 31119930 is about 5578.5239983350. The cubic root of 31119930 is about 314.5426469414.

It can be divided in two parts, 3111 and 9930, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 31119930 in words is "thirty-one million, one hundred nineteen thousand, nine hundred thirty".