531173020 has 48 divisors (see below), whose sum is σ = 1277918208. Its totient is φ = 181673280.

The previous prime is 531173009. The next prime is 531173029. The reversal of 531173020 is 20371135.

It is a junction number, because it is equal to n+sod(n) for n = 531172982 and 531173000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531173029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55939 + ... + 64741.

It is an arithmetic number, because the mean of its divisors is an integer number (26623296).

Almost surely, 2^531173020 is an apocalyptic number.

It is an amenable number.

531173020 is an abundant number, since it is smaller than the sum of its proper divisors (746745188).

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

531173020 is a wasteful number, since it uses less digits than its factorization.

531173020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250 (or 9248 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 531173020 is about 23047.1911520688. The cubic root of 531173020 is about 809.8638291644.

The spelling of 531173020 in words is "five hundred thirty-one million, one hundred seventy-three thousand, twenty".