40025431 has 4 divisors (see below), whose sum is σ = 40113472. Its totient is φ = 39937392.

The previous prime is 40025417. The next prime is 40025443. The reversal of 40025431 is 13452004.

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 40025431 - 2⁵ = 40025399 is a prime.

It is a super-2 number, since 2×40025431² = 3204070253471522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40025399 and 40025408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40025411) 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, 43335 + ... + 44248.

It is an arithmetic number, because the mean of its divisors is an integer number (10028368).

Almost surely, 2^40025431 is an apocalyptic number.

40025431 is a deficient number, since it is larger than the sum of its proper divisors (88041).

40025431 is an equidigital number, since it uses as much as digits as its factorization.

40025431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88040.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40025431 is about 6326.5654979617. The cubic root of 40025431 is about 342.0676513115.

Adding to 40025431 its reverse (13452004), we get a palindrome (53477435).

The spelling of 40025431 in words is "forty million, twenty-five thousand, four hundred thirty-one".