51455156 has 12 divisors (see below), whose sum is σ = 91745892. Its totient is φ = 25242048.

The previous prime is 51455143. The next prime is 51455167. The reversal of 51455156 is 65155415.

It can be written as a sum of positive squares in 2 ways, for example, as 15335056 + 36120100 = 3916^2 + 6010^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121145 + ... + 121568.

It is an arithmetic number, because the mean of its divisors is an integer number (7645491).

Almost surely, 2^51455156 is an apocalyptic number.

It is an amenable number.

51455156 is a deficient number, since it is larger than the sum of its proper divisors (40290736).

51455156 is a wasteful number, since it uses less digits than its factorization.

51455156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242770 (or 242768 counting only the distinct ones).

The product of its digits is 15000, while the sum is 32.

The square root of 51455156 is about 7173.2249372231. The cubic root of 51455156 is about 371.9429229884.

It can be divided in two parts, 5145 and 5156, that added together give a palindrome (10301).

The spelling of 51455156 in words is "fifty-one million, four hundred fifty-five thousand, one hundred fifty-six".