40434251 has 16 divisors (see below), whose sum is σ = 47832288. Its totient is φ = 33696000.

The previous prime is 40434227. The next prime is 40434281. The reversal of 40434251 is 15243404.

It is not a de Polignac number, because 40434251 - 2⁶ = 40434187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40434221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21551 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (2989518).

Almost surely, 2^40434251 is an apocalyptic number.

40434251 is a deficient number, since it is larger than the sum of its proper divisors (7398037).

40434251 is a wasteful number, since it uses less digits than its factorization.

40434251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40434251 is about 6358.7932031165. The cubic root of 40434251 is about 343.2283355263.

Adding to 40434251 its reverse (15243404), we get a palindrome (55677655).

The spelling of 40434251 in words is "forty million, four hundred thirty-four thousand, two hundred fifty-one".