42237557 has 2 divisors, whose sum is σ = 42237558. Its totient is φ = 42237556.

The previous prime is 42237523. The next prime is 42237563. The reversal of 42237557 is 75573224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 19589476 = 4759^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 42237557 - 2⁸ = 42237301 is a prime.

It is a super-2 number, since 2×42237557² = 3568022442656498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42237577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21118778 + 21118779.

It is an arithmetic number, because the mean of its divisors is an integer number (21118779).

Almost surely, 2^42237557 is an apocalyptic number.

It is an amenable number.

42237557 is a deficient number, since it is larger than the sum of its proper divisors (1).

42237557 is an equidigital number, since it uses as much as digits as its factorization.

42237557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 35.

The square root of 42237557 is about 6499.0427756709. The cubic root of 42237557 is about 348.2567934412.

The spelling of 42237557 in words is "forty-two million, two hundred thirty-seven thousand, five hundred fifty-seven".