51489597 has 16 divisors (see below), whose sum is σ = 69683328. Its totient is φ = 33815040.

The previous prime is 51489539. The next prime is 51489623. The reversal of 51489597 is 79598415.

It is not a de Polignac number, because 51489597 - 2⁷ = 51489469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86533 + ... + 87125.

It is an arithmetic number, because the mean of its divisors is an integer number (4355208).

Almost surely, 2^51489597 is an apocalyptic number.

It is an amenable number.

51489597 is a deficient number, since it is larger than the sum of its proper divisors (18193731).

51489597 is a wasteful number, since it uses less digits than its factorization.

51489597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980.

The product of its digits is 453600, while the sum is 48.

The square root of 51489597 is about 7175.6251992422. The cubic root of 51489597 is about 372.0258899197.

The spelling of 51489597 in words is "fifty-one million, four hundred eighty-nine thousand, five hundred ninety-seven".