52821742 has 4 divisors (see below), whose sum is σ = 79232616. Its totient is φ = 26410870.

The previous prime is 52821739. The next prime is 52821757. The reversal of 52821742 is 24712825.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13205434 + ... + 13205437.

It is an arithmetic number, because the mean of its divisors is an integer number (19808154).

Almost surely, 2^52821742 is an apocalyptic number.

52821742 is a deficient number, since it is larger than the sum of its proper divisors (26410874).

52821742 is a wasteful number, since it uses less digits than its factorization.

52821742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26410873.

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

The square root of 52821742 is about 7267.8567679888. The cubic root of 52821742 is about 375.2069778875.

The spelling of 52821742 in words is "fifty-two million, eight hundred twenty-one thousand, seven hundred forty-two".