51687234 has 20 divisors (see below), whose sum is σ = 115818054. Its totient is φ = 17229024.

The previous prime is 51687227. The next prime is 51687241. The reversal of 51687234 is 43278615.

It is an interprime number because it is at equal distance from previous prime (51687227) and next prime (51687241).

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 23011209 = 5355^2 + 4797^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159367 + ... + 159690.

Almost surely, 2^51687234 is an apocalyptic number.

51687234 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51687234 is an abundant number, since it is smaller than the sum of its proper divisors (64130820).

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

51687234 is a wasteful number, since it uses less digits than its factorization.

51687234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319071 (or 319062 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51687234 is about 7189.3834227978. The cubic root of 51687234 is about 372.5012753136.

The spelling of 51687234 in words is "fifty-one million, six hundred eighty-seven thousand, two hundred thirty-four".