52142287 has 4 divisors (see below), whose sum is σ = 53551576. Its totient is φ = 50733000.

The previous prime is 52142267. The next prime is 52142309. The reversal of 52142287 is 78224125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52142287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52142257) 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, 704589 + ... + 704662.

It is an arithmetic number, because the mean of its divisors is an integer number (13387894).

Almost surely, 2^52142287 is an apocalyptic number.

52142287 is a deficient number, since it is larger than the sum of its proper divisors (1409289).

52142287 is a wasteful number, since it uses less digits than its factorization.

52142287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409288.

The product of its digits is 8960, while the sum is 31.

The square root of 52142287 is about 7220.9616395602. The cubic root of 52142287 is about 373.5912465451.

The spelling of 52142287 in words is "fifty-two million, one hundred forty-two thousand, two hundred eighty-seven".