442253087 has 4 divisors (see below), whose sum is σ = 442475016. Its totient is φ = 442031160.

The previous prime is 442253069. The next prime is 442253089. The reversal of 442253087 is 780352244.

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

It is a cyclic number.

It is not a de Polignac number, because 442253087 - 2¹⁴ = 442236703 is a prime.

It is a super-2 number, since 2×442253087² = 391175585922059138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442253089) 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, 107948 + ... + 111969.

It is an arithmetic number, because the mean of its divisors is an integer number (110618754).

Almost surely, 2^442253087 is an apocalyptic number.

442253087 is a deficient number, since it is larger than the sum of its proper divisors (221929).

442253087 is a wasteful number, since it uses less digits than its factorization.

442253087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221928.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 442253087 is about 21029.8142407393. The cubic root of 442253087 is about 761.8865223006.

The spelling of 442253087 in words is "four hundred forty-two million, two hundred fifty-three thousand, eighty-seven".