40005157 has 2 divisors, whose sum is σ = 40005158. Its totient is φ = 40005156.

The previous prime is 40005143. The next prime is 40005167. The reversal of 40005157 is 75150004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 15413476 = 4959^2 + 3926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40005157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40005107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002578 + 20002579.

It is an arithmetic number, because the mean of its divisors is an integer number (20002579).

Almost surely, 2^40005157 is an apocalyptic number.

It is an amenable number.

40005157 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005157 is an equidigital number, since it uses as much as digits as its factorization.

40005157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 40005157 is about 6324.9630038444. The cubic root of 40005157 is about 342.0098859470.

The spelling of 40005157 in words is "forty million, five thousand, one hundred fifty-seven".