40244557 has 2 divisors, whose sum is σ = 40244558. Its totient is φ = 40244556.

The previous prime is 40244551. The next prime is 40244579. The reversal of 40244557 is 75544204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36168196 + 4076361 = 6014^2 + 2019^2 .

It is a cyclic number.

It is not a de Polignac number, because 40244557 - 2¹¹ = 40242509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40244551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122278 + 20122279.

It is an arithmetic number, because the mean of its divisors is an integer number (20122279).

Almost surely, 2^40244557 is an apocalyptic number.

It is an amenable number.

40244557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40244557 is an equidigital number, since it uses as much as digits as its factorization.

40244557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 40244557 is about 6343.8597872273. The cubic root of 40244557 is about 342.6907513634.

The spelling of 40244557 in words is "forty million, two hundred forty-four thousand, five hundred fifty-seven".