231201251 has 4 divisors (see below), whose sum is σ = 231431400. Its totient is φ = 230971104.

The previous prime is 231201227. The next prime is 231201283. The reversal of 231201251 is 152102132.

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 231201251 - 2²² = 227006947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231201151) 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, 113561 + ... + 115578.

It is an arithmetic number, because the mean of its divisors is an integer number (57857850).

Almost surely, 2^231201251 is an apocalyptic number.

231201251 is a deficient number, since it is larger than the sum of its proper divisors (230149).

231201251 is a wasteful number, since it uses less digits than its factorization.

231201251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230148.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 231201251 is about 15205.3033840170. The cubic root of 231201251 is about 613.7573790218.

Adding to 231201251 its reverse (152102132), we get a palindrome (383303383).

The spelling of 231201251 in words is "two hundred thirty-one million, two hundred one thousand, two hundred fifty-one".