40413251 has 4 divisors (see below), whose sum is σ = 40479792. Its totient is φ = 40346712.

The previous prime is 40413239. The next prime is 40413283. The reversal of 40413251 is 15231404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40413251 - 2²² = 36218947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42413251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32351 + ... + 33576.

It is an arithmetic number, because the mean of its divisors is an integer number (10119948).

Almost surely, 2^40413251 is an apocalyptic number.

40413251 is a deficient number, since it is larger than the sum of its proper divisors (66541).

40413251 is an equidigital number, since it uses as much as digits as its factorization.

40413251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66540.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40413251 is about 6357.1417319421. The cubic root of 40413251 is about 343.1689053564.

Adding to 40413251 its reverse (15231404), we get a palindrome (55644655).

The spelling of 40413251 in words is "forty million, four hundred thirteen thousand, two hundred fifty-one".