172573131240 has 96 divisors (see below), whose sum is σ = 560965747680. Its totient is φ = 46011044736.

The previous prime is 172573131229. The next prime is 172573131251. The reversal of 172573131240 is 42131375271.

172573131240 is a `hidden beast` number, since 1 + 72 + 573 + 1 + 3 + 12 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (172573131229) and next prime (172573131251).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 172573131195 and 172573131204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2056587 + ... + 2138853.

It is an arithmetic number, because the mean of its divisors is an integer number (5843393205).

Almost surely, 2^172573131240 is an apocalyptic number.

172573131240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172573131240 is an abundant number, since it is smaller than the sum of its proper divisors (388392616440).

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

172573131240 is a wasteful number, since it uses less digits than its factorization.

172573131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88111 (or 88104 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 172573131240 in words is "one hundred seventy-two billion, five hundred seventy-three million, one hundred thirty-one thousand, two hundred forty".