30217972 has 6 divisors (see below), whose sum is σ = 52881458. Its totient is φ = 15108984.

The previous prime is 30217933. The next prime is 30217973. The reversal of 30217972 is 27971203.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 2802276 = 5236^2 + 1674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30217973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3777243 + ... + 3777250.

Almost surely, 2^30217972 is an apocalyptic number.

It is an amenable number.

30217972 is a deficient number, since it is larger than the sum of its proper divisors (22663486).

30217972 is a wasteful number, since it uses less digits than its factorization.

30217972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554497 (or 7554495 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 30217972 is about 5497.0875925348. The cubic root of 30217972 is about 311.4739794151.

The spelling of 30217972 in words is "thirty million, two hundred seventeen thousand, nine hundred seventy-two".