51377808 has 80 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 15894528.

The previous prime is 51377803. The next prime is 51377813. The reversal of 51377808 is 80877315.

It is an interprime number because it is at equal distance from previous prime (51377803) and next prime (51377813).

It is not an unprimeable number, because it can be changed into a prime (51377803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64066 + ... + 64862.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^51377808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51377808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71245440).

51377808 is an abundant number, since it is smaller than the sum of its proper divisors (91113072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51377808 is a wasteful number, since it uses less digits than its factorization.

51377808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 51377808 is about 7167.8314712331. The cubic root of 51377808 is about 371.7564598568.

The spelling of 51377808 in words is "fifty-one million, three hundred seventy-seven thousand, eight hundred eight".