51742878 has 32 divisors (see below), whose sum is σ = 113173632. Its totient is φ = 15640800.

The previous prime is 51742877. The next prime is 51742879. The reversal of 51742878 is 87824715.

It is an interprime number because it is at equal distance from previous prime (51742877) and next prime (51742879).

Its product of digits (125440) is a multiple of the sum of its prime divisors (1960).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37000 + ... + 38372.

It is an arithmetic number, because the mean of its divisors is an integer number (3536676).

Almost surely, 2^51742878 is an apocalyptic number.

51742878 is an abundant number, since it is smaller than the sum of its proper divisors (61430754).

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

51742878 is a wasteful number, since it uses less digits than its factorization.

51742878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its digits is 125440, while the sum is 42.

The square root of 51742878 is about 7193.2522547176. The cubic root of 51742878 is about 372.6348997165.

The spelling of 51742878 in words is "fifty-one million, seven hundred forty-two thousand, eight hundred seventy-eight".