51717628 has 12 divisors (see below), whose sum is σ = 90562360. Its totient is φ = 25842672.

The previous prime is 51717623. The next prime is 51717647. The reversal of 51717628 is 82671715.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51717623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5878 + ... + 11746.

Almost surely, 2^51717628 is an apocalyptic number.

It is an amenable number.

51717628 is a deficient number, since it is larger than the sum of its proper divisors (38844732).

51717628 is a wasteful number, since it uses less digits than its factorization.

51717628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8076 (or 8074 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 51717628 is about 7191.4969234506. The cubic root of 51717628 is about 372.5742758361.

It can be divided in two parts, 517 and 17628, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 51717628 in words is "fifty-one million, seven hundred seventeen thousand, six hundred twenty-eight".