51789172 has 6 divisors (see below), whose sum is σ = 90631058. Its totient is φ = 25894584.

The previous prime is 51789103. The next prime is 51789181. The reversal of 51789172 is 27198715.

It can be written as a sum of positive squares in only one way, i.e., 35093776 + 16695396 = 5924^2 + 4086^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473643 + ... + 6473650.

Almost surely, 2^51789172 is an apocalyptic number.

It is an amenable number.

51789172 is a deficient number, since it is larger than the sum of its proper divisors (38841886).

51789172 is a wasteful number, since it uses less digits than its factorization.

51789172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12947297 (or 12947295 counting only the distinct ones).

The product of its digits is 35280, while the sum is 40.

The square root of 51789172 is about 7196.4694121493. The cubic root of 51789172 is about 372.7459978911.

The spelling of 51789172 in words is "fifty-one million, seven hundred eighty-nine thousand, one hundred seventy-two".