42791522 has 4 divisors (see below), whose sum is σ = 64187286. Its totient is φ = 21395760.

The previous prime is 42791521. The next prime is 42791537. The reversal of 42791522 is 22519724.

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

It can be written as a sum of positive squares in only one way, i.e., 38427601 + 4363921 = 6199^2 + 2089^2 .

It is a super-2 number, since 2×42791522² = 3662228710152968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42791521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10697879 + ... + 10697882.

Almost surely, 2^42791522 is an apocalyptic number.

42791522 is a deficient number, since it is larger than the sum of its proper divisors (21395764).

42791522 is a wasteful number, since it uses less digits than its factorization.

42791522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21395763.

The product of its digits is 10080, while the sum is 32.

The square root of 42791522 is about 6541.5229113716. The cubic root of 42791522 is about 349.7727013982.

The spelling of 42791522 in words is "forty-two million, seven hundred ninety-one thousand, five hundred twenty-two".