51444978 has 32 divisors (see below), whose sum is σ = 113170176. Its totient is φ = 15491328.

The previous prime is 51444973. The next prime is 51445019. The reversal of 51444978 is 87944415.

It is a super-2 number, since 2×51444978² = 5293171522840968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51444973) 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, 3351 + ... + 10682.

It is an arithmetic number, because the mean of its divisors is an integer number (3536568).

Almost surely, 2^51444978 is an apocalyptic number.

51444978 is an abundant number, since it is smaller than the sum of its proper divisors (61725198).

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

51444978 is a wasteful number, since it uses less digits than its factorization.

51444978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14098.

The product of its digits is 161280, while the sum is 42.

The square root of 51444978 is about 7172.5154583312. The cubic root of 51444978 is about 371.9183975246.

The spelling of 51444978 in words is "fifty-one million, four hundred forty-four thousand, nine hundred seventy-eight".