30531000 has 64 divisors (see below), whose sum is σ = 95266080. Its totient is φ = 8140800.

The previous prime is 30530999. The next prime is 30531013. The reversal of 30531000 is 13503.

It is a happy number.

It is a super-2 number, since 2×30531000² = 1864283922000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 2089 + ... + 8088.

Almost surely, 2^30531000 is an apocalyptic number.

30531000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30531000 is an abundant number, since it is smaller than the sum of its proper divisors (64735080).

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

30531000 is a wasteful number, since it uses less digits than its factorization.

30531000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 12.

The square root of 30531000 is about 5525.4864039286. The cubic root of 30531000 is about 312.5458066186.

Adding to 30531000 its reverse (13503), we get a palindrome (30544503).

The spelling of 30531000 in words is "thirty million, five hundred thirty-one thousand".