51440552 has 8 divisors (see below), whose sum is σ = 96451050. Its totient is φ = 25720272.

The previous prime is 51440551. The next prime is 51440561. The reversal of 51440552 is 25504415.

It can be written as a sum of positive squares in only one way, i.e., 26977636 + 24462916 = 5194^2 + 4946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×51440552² = 5292260780129408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51440551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3215027 + ... + 3215042.

Almost surely, 2^51440552 is an apocalyptic number.

It is an amenable number.

51440552 is a deficient number, since it is larger than the sum of its proper divisors (45010498).

51440552 is a wasteful number, since it uses less digits than its factorization.

51440552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430075 (or 6430071 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51440552 is about 7172.2069127989. The cubic root of 51440552 is about 371.9077313845.

Adding to 51440552 its reverse (25504415), we get a palindrome (76944967).

The spelling of 51440552 in words is "fifty-one million, four hundred forty thousand, five hundred fifty-two".