51477899 has 4 divisors (see below), whose sum is σ = 56157720. Its totient is φ = 46798080.

The previous prime is 51477847. The next prime is 51477931. The reversal of 51477899 is 99877415.

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

It is a cyclic number.

It is not a de Polignac number, because 51477899 - 2¹² = 51473803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51477199) 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, 2339894 + ... + 2339915.

It is an arithmetic number, because the mean of its divisors is an integer number (14039430).

Almost surely, 2^51477899 is an apocalyptic number.

51477899 is a deficient number, since it is larger than the sum of its proper divisors (4679821).

51477899 is a wasteful number, since it uses less digits than its factorization.

51477899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679820.

The product of its digits is 635040, while the sum is 50.

The square root of 51477899 is about 7174.8100323284. The cubic root of 51477899 is about 371.9977140762.

The spelling of 51477899 in words is "fifty-one million, four hundred seventy-seven thousand, eight hundred ninety-nine".