51917274 has 20 divisors (see below), whose sum is σ = 116333514. Its totient is φ = 17305704.

The previous prime is 51917207. The next prime is 51917287. The reversal of 51917274 is 47271915.

It is a happy number.

51917274 is a `hidden beast` number, since 519 + 1 + 72 + 74 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26967249 + 24950025 = 5193^2 + 4995^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 160077 + ... + 160400.

Almost surely, 2^51917274 is an apocalyptic number.

51917274 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51917274 is an abundant number, since it is smaller than the sum of its proper divisors (64416240).

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

51917274 is a wasteful number, since it uses less digits than its factorization.

51917274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320491 (or 320482 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 51917274 is about 7205.3642517225. The cubic root of 51917274 is about 373.0530774734.

The spelling of 51917274 in words is "fifty-one million, nine hundred seventeen thousand, two hundred seventy-four".