51455164 has 48 divisors (see below), whose sum is σ = 98784000. Its totient is φ = 23385600.

The previous prime is 51455143. The next prime is 51455167. The reversal of 51455164 is 46155415.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147262 + ... + 147610.

It is an arithmetic number, because the mean of its divisors is an integer number (2058000).

Almost surely, 2^51455164 is an apocalyptic number.

It is an amenable number.

51455164 is a deficient number, since it is larger than the sum of its proper divisors (47328836).

51455164 is a wasteful number, since it uses less digits than its factorization.

51455164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 51455164 is about 7173.2254948524. The cubic root of 51455164 is about 371.9429422644.

The spelling of 51455164 in words is "fifty-one million, four hundred fifty-five thousand, one hundred sixty-four".