40381157 has 2 divisors, whose sum is σ = 40381158. Its totient is φ = 40381156.

The previous prime is 40381139. The next prime is 40381163. The reversal of 40381157 is 75118304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 1018081 = 6274^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 40381157 - 2⁶ = 40381093 is a prime.

It is a super-3 number, since 3×40381157³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40381357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190578 + 20190579.

It is an arithmetic number, because the mean of its divisors is an integer number (20190579).

Almost surely, 2^40381157 is an apocalyptic number.

It is an amenable number.

40381157 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381157 is an equidigital number, since it uses as much as digits as its factorization.

40381157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 40381157 is about 6354.6169829503. The cubic root of 40381157 is about 343.0780392886.

The spelling of 40381157 in words is "forty million, three hundred eighty-one thousand, one hundred fifty-seven".