51974477 has 4 divisors (see below), whose sum is σ = 52002720. Its totient is φ = 51946236.

The previous prime is 51974473. The next prime is 51974497. The reversal of 51974477 is 77447915.

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: 77447915 = 5 ⋅15489583.

It is a cyclic number.

It is not a de Polignac number, because 51974477 - 2² = 51974473 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 (51974473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11153 + ... + 15110.

It is an arithmetic number, because the mean of its divisors is an integer number (13000680).

Almost surely, 2^51974477 is an apocalyptic number.

It is an amenable number.

51974477 is a deficient number, since it is larger than the sum of its proper divisors (28243).

51974477 is a wasteful number, since it uses less digits than its factorization.

51974477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28242.

The product of its digits is 246960, while the sum is 44.

The square root of 51974477 is about 7209.3326320818. The cubic root of 51974477 is about 373.1900384556.

The spelling of 51974477 in words is "fifty-one million, nine hundred seventy-four thousand, four hundred seventy-seven".