51374977 has 4 divisors (see below), whose sum is σ = 51395796. Its totient is φ = 51354160.

The previous prime is 51374959. The next prime is 51375001. The reversal of 51374977 is 77947315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77947315 = 5 ⋅15589463.

It can be written as a sum of positive squares in 2 ways, for example, as 44635761 + 6739216 = 6681^2 + 2596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51374977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51374957) 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, 6118 + ... + 11839.

It is an arithmetic number, because the mean of its divisors is an integer number (12848949).

Almost surely, 2^51374977 is an apocalyptic number.

It is an amenable number.

51374977 is a deficient number, since it is larger than the sum of its proper divisors (20819).

51374977 is a wasteful number, since it uses less digits than its factorization.

51374977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20818.

The product of its digits is 185220, while the sum is 43.

The square root of 51374977 is about 7167.6339889813. The cubic root of 51374977 is about 371.7496316048.

The spelling of 51374977 in words is "fifty-one million, three hundred seventy-four thousand, nine hundred seventy-seven".