51477971 has 4 divisors (see below), whose sum is σ = 51693600. Its totient is φ = 51262344.

The previous prime is 51477953. The next prime is 51477977. The reversal of 51477971 is 17977415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51477971 - 2²² = 47283667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51477977) 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, 107456 + ... + 107933.

It is an arithmetic number, because the mean of its divisors is an integer number (12923400).

Almost surely, 2^51477971 is an apocalyptic number.

51477971 is a deficient number, since it is larger than the sum of its proper divisors (215629).

51477971 is a wasteful number, since it uses less digits than its factorization.

51477971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215628.

The product of its digits is 61740, while the sum is 41.

The square root of 51477971 is about 7174.8150498811. The cubic root of 51477971 is about 371.9978875087.

The spelling of 51477971 in words is "fifty-one million, four hundred seventy-seven thousand, nine hundred seventy-one".