51477898 has 4 divisors (see below), whose sum is σ = 77216850. Its totient is φ = 25738948.

The previous prime is 51477847. The next prime is 51477931. The reversal of 51477898 is 89877415.

51477898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89877415 = 5 ⋅17975483.

It can be written as a sum of positive squares in only one way, i.e., 48066489 + 3411409 = 6933^2 + 1847^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12869473 + ... + 12869476.

Almost surely, 2^51477898 is an apocalyptic number.

51477898 is a deficient number, since it is larger than the sum of its proper divisors (25738952).

51477898 is a wasteful number, since it uses less digits than its factorization.

51477898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25738951.

The product of its digits is 564480, while the sum is 49.

The square root of 51477898 is about 7174.8099626401. The cubic root of 51477898 is about 371.9977116674.

The spelling of 51477898 in words is "fifty-one million, four hundred seventy-seven thousand, eight hundred ninety-eight".