51247474 has 4 divisors (see below), whose sum is σ = 76871214. Its totient is φ = 25623736.

The previous prime is 51247451. The next prime is 51247477. The reversal of 51247474 is 47474215.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 31843449 + 19404025 = 5643^2 + 4405^2 .

It is not an unprimeable number, because it can be changed into a prime (51247477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12811867 + ... + 12811870.

Almost surely, 2^51247474 is an apocalyptic number.

51247474 is a deficient number, since it is larger than the sum of its proper divisors (25623740).

51247474 is a wasteful number, since it uses less digits than its factorization.

51247474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25623739.

The product of its digits is 31360, while the sum is 34.

The square root of 51247474 is about 7158.7341059715. The cubic root of 51247474 is about 371.4418393542.

The spelling of 51247474 in words is "fifty-one million, two hundred forty-seven thousand, four hundred seventy-four".