51477694 has 4 divisors (see below), whose sum is σ = 77216544. Its totient is φ = 25738846.

The previous prime is 51477691. The next prime is 51477721. The reversal of 51477694 is 49677415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51477694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51477691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12869422 + ... + 12869425.

It is an arithmetic number, because the mean of its divisors is an integer number (19304136).

Almost surely, 2^51477694 is an apocalyptic number.

51477694 is a deficient number, since it is larger than the sum of its proper divisors (25738850).

51477694 is a wasteful number, since it uses less digits than its factorization.

51477694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25738849.

The product of its digits is 211680, while the sum is 43.

The square root of 51477694 is about 7174.7957462216. The cubic root of 51477694 is about 371.9972202744.

The spelling of 51477694 in words is "fifty-one million, four hundred seventy-seven thousand, six hundred ninety-four".