654216502 has 4 divisors (see below), whose sum is σ = 981324756. Its totient is φ = 327108250.

The previous prime is 654216487. The next prime is 654216503. The reversal of 654216502 is 205612456.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654216503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163554124 + ... + 163554127.

It is an arithmetic number, because the mean of its divisors is an integer number (245331189).

Almost surely, 2^654216502 is an apocalyptic number.

654216502 is a deficient number, since it is larger than the sum of its proper divisors (327108254).

654216502 is a wasteful number, since it uses less digits than its factorization.

654216502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327108253.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 654216502 is about 25577.6563038915. The cubic root of 654216502 is about 868.1081460742.

Adding to 654216502 its reverse (205612456), we get a palindrome (859828958).

It can be divided in two parts, 654 and 216502, that added together give a square (217156 = 466²).

The spelling of 654216502 in words is "six hundred fifty-four million, two hundred sixteen thousand, five hundred two".