216542754 has 32 divisors (see below), whose sum is σ = 492402240. Its totient is φ = 70501536.

The previous prime is 216542731. The next prime is 216542761. The reversal of 216542754 is 457245612.

It is a happy number.

It is a Curzon 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, 44307 + ... + 48950.

It is an arithmetic number, because the mean of its divisors is an integer number (15387570).

Almost surely, 2^216542754 is an apocalyptic number.

216542754 is an abundant number, since it is smaller than the sum of its proper divisors (275859486).

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

216542754 is a wasteful number, since it uses less digits than its factorization.

216542754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93311 (or 93305 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 216542754 is about 14715.3917379049. The cubic root of 216542754 is about 600.5021296591.

The spelling of 216542754 in words is "two hundred sixteen million, five hundred forty-two thousand, seven hundred fifty-four".