51917364 has 36 divisors (see below), whose sum is σ = 134785924. Its totient is φ = 16837632.

The previous prime is 51917353. The next prime is 51917389. The reversal of 51917364 is 46371915.

It can be written as a sum of positive squares in 2 ways, for example, as 23912100 + 28005264 = 4890^2 + 5292^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18157 + ... + 20820.

Almost surely, 2^51917364 is an apocalyptic number.

It is an amenable number.

51917364 is an abundant number, since it is smaller than the sum of its proper divisors (82868560).

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

51917364 is a wasteful number, since it uses less digits than its factorization.

51917364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39024 (or 39019 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 51917364 is about 7205.3704970668. The cubic root of 51917364 is about 373.0532930391.

The spelling of 51917364 in words is "fifty-one million, nine hundred seventeen thousand, three hundred sixty-four".