51878454 has 16 divisors (see below), whose sum is σ = 104068848. Its totient is φ = 17240832.

The previous prime is 51878443. The next prime is 51878471. The reversal of 51878454 is 45487815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10807 + ... + 14850.

It is an arithmetic number, because the mean of its divisors is an integer number (6504303).

Almost surely, 2^51878454 is an apocalyptic number.

51878454 is an abundant number, since it is smaller than the sum of its proper divisors (52190394).

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

51878454 is a wasteful number, since it uses less digits than its factorization.

51878454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25999.

The product of its digits is 179200, while the sum is 42.

The square root of 51878454 is about 7202.6699216332. The cubic root of 51878454 is about 372.9600735438.

The spelling of 51878454 in words is "fifty-one million, eight hundred seventy-eight thousand, four hundred fifty-four".