231420245 has 16 divisors (see below), whose sum is σ = 324131328. Its totient is φ = 155310720.

The previous prime is 231420229. The next prime is 231420253. The reversal of 231420245 is 542024132.

It is a happy number.

It is not a de Polignac number, because 231420245 - 2⁴ = 231420229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231420245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68696 + ... + 71985.

It is an arithmetic number, because the mean of its divisors is an integer number (20258208).

Almost surely, 2^231420245 is an apocalyptic number.

It is an amenable number.

231420245 is a deficient number, since it is larger than the sum of its proper divisors (92711083).

231420245 is a wasteful number, since it uses less digits than its factorization.

231420245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140740.

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

The square root of 231420245 is about 15212.5029170088. The cubic root of 231420245 is about 613.9511016879.

Adding to 231420245 its reverse (542024132), we get a palindrome (773444377).

The spelling of 231420245 in words is "two hundred thirty-one million, four hundred twenty thousand, two hundred forty-five".