42155653 has 2 divisors, whose sum is σ = 42155654. Its totient is φ = 42155652.

The previous prime is 42155621. The next prime is 42155657. The reversal of 42155653 is 35655124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34304449 + 7851204 = 5857^2 + 2802^2 .

It is a cyclic number.

It is not a de Polignac number, because 42155653 - 2⁵ = 42155621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42155657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077826 + 21077827.

It is an arithmetic number, because the mean of its divisors is an integer number (21077827).

Almost surely, 2^42155653 is an apocalyptic number.

It is an amenable number.

42155653 is a deficient number, since it is larger than the sum of its proper divisors (1).

42155653 is an equidigital number, since it uses as much as digits as its factorization.

42155653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 42155653 is about 6492.7384823355. The cubic root of 42155653 is about 348.0315430298.

The spelling of 42155653 in words is "forty-two million, one hundred fifty-five thousand, six hundred fifty-three".