51878632 has 16 divisors (see below), whose sum is σ = 104755140. Its totient is φ = 23943936.

The previous prime is 51878621. The next prime is 51878633. The reversal of 51878632 is 23687815.

It can be written as a sum of positive squares in 2 ways, for example, as 51351556 + 527076 = 7166^2 + 726^2 .

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (51878633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249313 + ... + 249520.

Almost surely, 2^51878632 is an apocalyptic number.

51878632 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51878632 is an abundant number, since it is smaller than the sum of its proper divisors (52876508).

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

51878632 is a wasteful number, since it uses less digits than its factorization.

51878632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498852 (or 498848 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 51878632 is about 7202.6822781517. The cubic root of 51878632 is about 372.9605000974.

The spelling of 51878632 in words is "fifty-one million, eight hundred seventy-eight thousand, six hundred thirty-two".