30157212 has 24 divisors (see below), whose sum is σ = 71696016. Its totient is φ = 9862528.

The previous prime is 30157207. The next prime is 30157213. The reversal of 30157212 is 21275103.

It is a super-2 number, since 2×30157212² = 1818914871225888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30157213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23073 + ... + 24344.

It is an arithmetic number, because the mean of its divisors is an integer number (2987334).

Almost surely, 2^30157212 is an apocalyptic number.

It is an amenable number.

30157212 is an abundant number, since it is smaller than the sum of its proper divisors (41538804).

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

30157212 is a wasteful number, since it uses less digits than its factorization.

30157212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47477 (or 47475 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 30157212 is about 5491.5582488033. The cubic root of 30157212 is about 311.2650766072.

The spelling of 30157212 in words is "thirty million, one hundred fifty-seven thousand, two hundred twelve".