51381468 has 36 divisors (see below), whose sum is σ = 130268320. Its totient is φ = 17076096.

The previous prime is 51381437. The next prime is 51381469. The reversal of 51381468 is 86418315.

51381468 is a `hidden beast` number, since 513 + 81 + 4 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11268 + ... + 15156.

Almost surely, 2^51381468 is an apocalyptic number.

It is an amenable number.

51381468 is an abundant number, since it is smaller than the sum of its proper divisors (78886852).

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

51381468 is a wasteful number, since it uses less digits than its factorization.

51381468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266 (or 4261 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 51381468 is about 7168.0867740283. The cubic root of 51381468 is about 371.7652872500.

The spelling of 51381468 in words is "fifty-one million, three hundred eighty-one thousand, four hundred sixty-eight".