40136557 has 2 divisors, whose sum is σ = 40136558. Its totient is φ = 40136556.

The previous prime is 40136539. The next prime is 40136561. The reversal of 40136557 is 75563104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35688676 + 4447881 = 5974^2 + 2109^2 .

It is a cyclic number.

It is not a de Polignac number, because 40136557 - 2¹⁹ = 39612269 is a prime.

It is a super-2 number, since 2×40136557² = 3221886415628498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40136567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20068278 + 20068279.

It is an arithmetic number, because the mean of its divisors is an integer number (20068279).

Almost surely, 2^40136557 is an apocalyptic number.

It is an amenable number.

40136557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40136557 is an equidigital number, since it uses as much as digits as its factorization.

40136557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 40136557 is about 6335.3419007975. The cubic root of 40136557 is about 342.3839292696.

The spelling of 40136557 in words is "forty million, one hundred thirty-six thousand, five hundred fifty-seven".