40572157 has 2 divisors, whose sum is σ = 40572158. Its totient is φ = 40572156.

The previous prime is 40572121. The next prime is 40572187. The reversal of 40572157 is 75127504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21335161 + 19236996 = 4619^2 + 4386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40572157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40572107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20286078 + 20286079.

It is an arithmetic number, because the mean of its divisors is an integer number (20286079).

Almost surely, 2^40572157 is an apocalyptic number.

It is an amenable number.

40572157 is a deficient number, since it is larger than the sum of its proper divisors (1).

40572157 is an equidigital number, since it uses as much as digits as its factorization.

40572157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 40572157 is about 6369.6276971264. The cubic root of 40572157 is about 343.6181002715.

The spelling of 40572157 in words is "forty million, five hundred seventy-two thousand, one hundred fifty-seven".