51400134 has 24 divisors (see below), whose sum is σ = 111565272. Its totient is φ = 17102880.

The previous prime is 51400133. The next prime is 51400169. The reversal of 51400134 is 43100415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400133) 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 11 ways as a sum of consecutive naturals, for example, 9354 + ... + 13794.

It is an arithmetic number, because the mean of its divisors is an integer number (4648553).

Almost surely, 2^51400134 is an apocalyptic number.

51400134 is an abundant number, since it is smaller than the sum of its proper divisors (60165138).

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

51400134 is a wasteful number, since it uses less digits than its factorization.

51400134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092 (or 5089 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51400134 is about 7169.3886768678. The cubic root of 51400134 is about 371.8103004358.

Adding to 51400134 its reverse (43100415), we get a palindrome (94500549).

The spelling of 51400134 in words is "fifty-one million, four hundred thousand, one hundred thirty-four".