31320552120 has 128 divisors (see below), whose sum is σ = 110388579840. Its totient is φ = 7008791040.

The previous prime is 31320552097. The next prime is 31320552143. The reversal of 31320552120 is 2125502313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31320552097) and next prime (31320552143).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895444 + ... + 929763.

It is an arithmetic number, because the mean of its divisors is an integer number (862410780).

Almost surely, 2^31320552120 is an apocalyptic number.

31320552120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31320552120 is an abundant number, since it is smaller than the sum of its proper divisors (79068027720).

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

31320552120 is a wasteful number, since it uses less digits than its factorization.

31320552120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825245 (or 1825241 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 31320552120 in words is "thirty-one billion, three hundred twenty million, five hundred fifty-two thousand, one hundred twenty".