52215642 has 12 divisors (see below), whose sum is σ = 113133930. Its totient is φ = 17405208.

The previous prime is 52215641. The next prime is 52215643. The reversal of 52215642 is 24651225.

52215642 is a `hidden beast` number, since 5 + 2 + 2 + 15 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (52215641) and next prime (52215643).

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 5716881 = 6819^2 + 2391^2 .

It is not an unprimeable number, because it can be changed into a prime (52215641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1450417 + ... + 1450452.

Almost surely, 2^52215642 is an apocalyptic number.

52215642 is an abundant number, since it is smaller than the sum of its proper divisors (60918288).

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

52215642 is a wasteful number, since it uses less digits than its factorization.

52215642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900877 (or 2900874 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 52215642 is about 7226.0391640234. The cubic root of 52215642 is about 373.7663567820.

Adding to 52215642 its reverse (24651225), we get a palindrome (76866867).

The spelling of 52215642 in words is "fifty-two million, two hundred fifteen thousand, six hundred forty-two".