51297477 has 16 divisors (see below), whose sum is σ = 85274112. Its totient is φ = 26647920.

The previous prime is 51297469. The next prime is 51297487. The reversal of 51297477 is 77479215.

It is not a de Polignac number, because 51297477 - 2³ = 51297469 is a prime.

It is a super-2 number, since 2×51297477² = 5262862293131058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51297427) 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, 110803 + ... + 111264.

It is an arithmetic number, because the mean of its divisors is an integer number (5329632).

Almost surely, 2^51297477 is an apocalyptic number.

It is an amenable number.

51297477 is a deficient number, since it is larger than the sum of its proper divisors (33976635).

51297477 is a wasteful number, since it uses less digits than its factorization.

51297477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222088.

The product of its digits is 123480, while the sum is 42.

The square root of 51297477 is about 7162.2257015540. The cubic root of 51297477 is about 371.5626073803.

The spelling of 51297477 in words is "fifty-one million, two hundred ninety-seven thousand, four hundred seventy-seven".