231425511 has 4 divisors (see below), whose sum is σ = 308567352. Its totient is φ = 154283672.

The previous prime is 231425501. The next prime is 231425531. The reversal of 231425511 is 115524132.

It is a happy number.

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 231425511 - 2¹⁴ = 231409127 is a prime.

It is a super-2 number, since 2×231425511² = 107115534283222242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231425501) 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 3 ways as a sum of consecutive naturals, for example, 38570916 + ... + 38570921.

It is an arithmetic number, because the mean of its divisors is an integer number (77141838).

Almost surely, 2^231425511 is an apocalyptic number.

231425511 is a deficient number, since it is larger than the sum of its proper divisors (77141841).

231425511 is an equidigital number, since it uses as much as digits as its factorization.

231425511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77141840.

The product of its digits is 1200, while the sum is 24.

The square root of 231425511 is about 15212.6759973385. The cubic root of 231425511 is about 613.9557585003.

Adding to 231425511 its reverse (115524132), we get a palindrome (346949643).

The spelling of 231425511 in words is "two hundred thirty-one million, four hundred twenty-five thousand, five hundred eleven".