51441978 has 16 divisors (see below), whose sum is σ = 117581760. Its totient is φ = 14697696.

The previous prime is 51441967. The next prime is 51441979. The reversal of 51441978 is 87914415.

It is not an unprimeable number, because it can be changed into a prime (51441979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612363 + ... + 612446.

It is an arithmetic number, because the mean of its divisors is an integer number (7348860).

Almost surely, 2^51441978 is an apocalyptic number.

51441978 is an abundant number, since it is smaller than the sum of its proper divisors (66139782).

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

51441978 is a wasteful number, since it uses less digits than its factorization.

51441978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224821.

The product of its digits is 40320, while the sum is 39.

The square root of 51441978 is about 7172.3063236312. The cubic root of 51441978 is about 371.9111679438.

The spelling of 51441978 in words is "fifty-one million, four hundred forty-one thousand, nine hundred seventy-eight".