51881830 has 128 divisors (see below), whose sum is σ = 128894976. Its totient is φ = 14515200.

The previous prime is 51881801. The next prime is 51881833. The reversal of 51881830 is 3818815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881833) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 710674 + ... + 710746.

It is an arithmetic number, because the mean of its divisors is an integer number (1006992).

Almost surely, 2^51881830 is an apocalyptic number.

51881830 is an abundant number, since it is smaller than the sum of its proper divisors (77013146).

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

51881830 is a wasteful number, since it uses less digits than its factorization.

51881830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 51881830 is about 7202.9042753600. The cubic root of 51881830 is about 372.9681635170.

The spelling of 51881830 in words is "fifty-one million, eight hundred eighty-one thousand, eight hundred thirty".