217074072 has 32 divisors (see below), whose sum is σ = 543066480. Its totient is φ = 72307200.

The previous prime is 217074047. The next prime is 217074073. The reversal of 217074072 is 270470712.

It is a super-2 number, since 2×217074072² = 94242305469322368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217074073) 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, 49572 + ... + 53772.

Almost surely, 2^217074072 is an apocalyptic number.

It is an amenable number.

217074072 is an abundant number, since it is smaller than the sum of its proper divisors (325992408).

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

217074072 is a wasteful number, since it uses less digits than its factorization.

217074072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363 (or 6359 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 217074072 is about 14733.4338156453. The cubic root of 217074072 is about 600.9928672293.

The spelling of 217074072 in words is "two hundred seventeen million, seventy-four thousand, seventy-two".