51378722 has 16 divisors (see below), whose sum is σ = 79168320. Its totient is φ = 24994032.

The previous prime is 51378713. The next prime is 51378737. The reversal of 51378722 is 22787315.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24179 + ... + 26217.

It is an arithmetic number, because the mean of its divisors is an integer number (4948020).

Almost surely, 2^51378722 is an apocalyptic number.

51378722 is a deficient number, since it is larger than the sum of its proper divisors (27789598).

51378722 is a wasteful number, since it uses less digits than its factorization.

51378722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377.

The product of its digits is 23520, while the sum is 35.

The square root of 51378722 is about 7167.8952280289. The cubic root of 51378722 is about 371.7586643325.

The spelling of 51378722 in words is "fifty-one million, three hundred seventy-eight thousand, seven hundred twenty-two".