442231157 has 2 divisors, whose sum is σ = 442231158. Its totient is φ = 442231156.

The previous prime is 442231147. The next prime is 442231169. The reversal of 442231157 is 751132244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239197156 + 203034001 = 15466^2 + 14249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442231157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442231147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221115578 + 221115579.

It is an arithmetic number, because the mean of its divisors is an integer number (221115579).

Almost surely, 2^442231157 is an apocalyptic number.

It is an amenable number.

442231157 is a deficient number, since it is larger than the sum of its proper divisors (1).

442231157 is an equidigital number, since it uses as much as digits as its factorization.

442231157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 442231157 is about 21029.2928316670. The cubic root of 442231157 is about 761.8739288724.

The spelling of 442231157 in words is "four hundred forty-two million, two hundred thirty-one thousand, one hundred fifty-seven".