40216257 has 24 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 26678160.

The previous prime is 40216219. The next prime is 40216273. The reversal of 40216257 is 75261204.

40216257 is a `hidden beast` number, since 402 + 1 + 6 + 257 = 666.

It is not a de Polignac number, because 40216257 - 2⁶ = 40216193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40216257.

It is not an unprimeable number, because it can be changed into a prime (40216277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87007 + ... + 87467.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^40216257 is an apocalyptic number.

It is an amenable number.

40216257 is a deficient number, since it is larger than the sum of its proper divisors (20324223).

40216257 is an equidigital number, since it uses as much as digits as its factorization.

40216257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 40216257 is about 6341.6288916965. The cubic root of 40216257 is about 342.6104057372.

The spelling of 40216257 in words is "forty million, two hundred sixteen thousand, two hundred fifty-seven".