40213057 has 2 divisors, whose sum is σ = 40213058. Its totient is φ = 40213056.

The previous prime is 40213027. The next prime is 40213073. The reversal of 40213057 is 75031204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 156816 = 6329^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 40213057 - 2¹¹ = 40211009 is a prime.

It is not a weakly prime, because it can be changed into another prime (40213027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106528 + 20106529.

It is an arithmetic number, because the mean of its divisors is an integer number (20106529).

Almost surely, 2^40213057 is an apocalyptic number.

It is an amenable number.

40213057 is a deficient number, since it is larger than the sum of its proper divisors (1).

40213057 is an equidigital number, since it uses as much as digits as its factorization.

40213057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 40213057 is about 6341.3765855688. The cubic root of 40213057 is about 342.6013183476.

The spelling of 40213057 in words is "forty million, two hundred thirteen thousand, fifty-seven".