52215878 has 64 divisors (see below), whose sum is σ = 97118784. Its totient is φ = 20736000.

The previous prime is 52215871. The next prime is 52215883. The reversal of 52215878 is 87851225.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52215871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 715250 + ... + 715322.

It is an arithmetic number, because the mean of its divisors is an integer number (1517481).

Almost surely, 2^52215878 is an apocalyptic number.

52215878 is a deficient number, since it is larger than the sum of its proper divisors (44902906).

52215878 is a wasteful number, since it uses less digits than its factorization.

52215878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 44800, while the sum is 38.

The square root of 52215878 is about 7226.0554938362. The cubic root of 52215878 is about 373.7669198874.

The spelling of 52215878 in words is "fifty-two million, two hundred fifteen thousand, eight hundred seventy-eight".