51400474 has 12 divisors (see below), whose sum is σ = 79245054. Its totient is φ = 25004304.

The previous prime is 51400471. The next prime is 51400501. The reversal of 51400474 is 47400415.

It can be written as a sum of positive squares in 3 ways, for example, as 42055225 + 9345249 = 6485^2 + 3057^2 .

It is not an unprimeable number, because it can be changed into a prime (51400471) 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 5 ways as a sum of consecutive naturals, for example, 6649 + ... + 12124.

Almost surely, 2^51400474 is an apocalyptic number.

51400474 is a deficient number, since it is larger than the sum of its proper divisors (27844580).

51400474 is a wasteful number, since it uses less digits than its factorization.

51400474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18849 (or 18812 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 51400474 is about 7169.4123887527. The cubic root of 51400474 is about 371.8111202471.

Adding to 51400474 its reverse (47400415), we get a palindrome (98800889).

The spelling of 51400474 in words is "fifty-one million, four hundred thousand, four hundred seventy-four".