51880881 has 16 divisors (see below), whose sum is σ = 75520256. Its totient is φ = 31487616.

The previous prime is 51880879. The next prime is 51880987. The reversal of 51880881 is 18808815.

It is not a de Polignac number, because 51880881 - 2¹ = 51880879 is a prime.

It is a super-2 number, since 2×51880881² = 5383251626672322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51880831) 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, 6265 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (4720016).

Almost surely, 2^51880881 is an apocalyptic number.

It is an amenable number.

51880881 is a deficient number, since it is larger than the sum of its proper divisors (23639375).

51880881 is a wasteful number, since it uses less digits than its factorization.

51880881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18312.

The product of its (nonzero) digits is 20480, while the sum is 39.

The square root of 51880881 is about 7202.8383988536. The cubic root of 51880881 is about 372.9658894456.

The spelling of 51880881 in words is "fifty-one million, eight hundred eighty thousand, eight hundred eighty-one".