51457477 has 4 divisors (see below), whose sum is σ = 51938496. Its totient is φ = 50976460.

The previous prime is 51457451. The next prime is 51457537. The reversal of 51457477 is 77475415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77475415 = 5 ⋅15495083.

It is a cyclic number.

It is not a de Polignac number, because 51457477 - 2⁷ = 51457349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51457277) 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, 240349 + ... + 240562.

It is an arithmetic number, because the mean of its divisors is an integer number (12984624).

Almost surely, 2^51457477 is an apocalyptic number.

It is an amenable number.

51457477 is a deficient number, since it is larger than the sum of its proper divisors (481019).

51457477 is a wasteful number, since it uses less digits than its factorization.

51457477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481018.

The product of its digits is 137200, while the sum is 40.

The square root of 51457477 is about 7173.3867175833. The cubic root of 51457477 is about 371.9485153438.

The spelling of 51457477 in words is "fifty-one million, four hundred fifty-seven thousand, four hundred seventy-seven".