249670431 has 20 divisors (see below), whose sum is σ = 392596600. Its totient is φ = 157685616.

The previous prime is 249670409. The next prime is 249670433. The reversal of 249670431 is 134076942.

It is not a de Polignac number, because 249670431 - 2⁷ = 249670303 is a prime.

It is a super-2 number, since 2×249670431² = 124670648231451522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249670433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79576 + ... + 82653.

It is an arithmetic number, because the mean of its divisors is an integer number (19629830).

Almost surely, 2^249670431 is an apocalyptic number.

249670431 is a deficient number, since it is larger than the sum of its proper divisors (142926169).

249670431 is a wasteful number, since it uses less digits than its factorization.

249670431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162260 (or 162251 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 249670431 is about 15800.9629769834. The cubic root of 249670431 is about 629.6835826026.

It can be divided in two parts, 2496 and 70431, that added together give a palindrome (72927).

The spelling of 249670431 in words is "two hundred forty-nine million, six hundred seventy thousand, four hundred thirty-one".