231225501 has 16 divisors (see below), whose sum is σ = 334252800. Its totient is φ = 141334080.

The previous prime is 231225493. The next prime is 231225503. The reversal of 231225501 is 105522132.

231225501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231225501 - 2³ = 231225493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231225503) 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, 14085 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (20890800).

Almost surely, 2^231225501 is an apocalyptic number.

It is an amenable number.

231225501 is a deficient number, since it is larger than the sum of its proper divisors (103027299).

231225501 is a wasteful number, since it uses less digits than its factorization.

231225501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39956.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 231225501 is about 15206.1007822518. The cubic root of 231225501 is about 613.7788366567.

Adding to 231225501 its reverse (105522132), we get a palindrome (336747633).

The spelling of 231225501 in words is "two hundred thirty-one million, two hundred twenty-five thousand, five hundred one".