216973492 has 6 divisors (see below), whose sum is σ = 379703618. Its totient is φ = 108486744.

The previous prime is 216973489. The next prime is 216973501. The reversal of 216973492 is 294379612.

216973492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 162715536 + 54257956 = 12756^2 + 7366^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27121683 + ... + 27121690.

Almost surely, 2^216973492 is an apocalyptic number.

It is an amenable number.

216973492 is a deficient number, since it is larger than the sum of its proper divisors (162730126).

216973492 is a wasteful number, since it uses less digits than its factorization.

216973492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54243377 (or 54243375 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 216973492 is about 14730.0200950304. The cubic root of 216973492 is about 600.9000307143.

The spelling of 216973492 in words is "two hundred sixteen million, nine hundred seventy-three thousand, four hundred ninety-two".