216402754 has 8 divisors (see below), whose sum is σ = 335075328. Its totient is φ = 104710980.

The previous prime is 216402721. The next prime is 216402779. The reversal of 216402754 is 457204612.

216402754 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745122 + ... + 1745245.

It is an arithmetic number, because the mean of its divisors is an integer number (41884416).

Almost surely, 2^216402754 is an apocalyptic number.

216402754 is a deficient number, since it is larger than the sum of its proper divisors (118672574).

216402754 is a wasteful number, since it uses less digits than its factorization.

216402754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490400.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 216402754 is about 14710.6340447990. The cubic root of 216402754 is about 600.3726888275.

It can be divided in two parts, 216402 and 754, that added together give a square (217156 = 466²).

The spelling of 216402754 in words is "two hundred sixteen million, four hundred two thousand, seven hundred fifty-four".