231402551 has 8 divisors (see below), whose sum is σ = 239037024. Its totient is φ = 223840800.

The previous prime is 231402547. The next prime is 231402559. The reversal of 231402551 is 155204132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231402551 - 2² = 231402547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231402559) 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 7 ways as a sum of consecutive naturals, for example, 11675 + ... + 24476.

It is an arithmetic number, because the mean of its divisors is an integer number (29879628).

Almost surely, 2^231402551 is an apocalyptic number.

231402551 is a deficient number, since it is larger than the sum of its proper divisors (7634473).

231402551 is a wasteful number, since it uses less digits than its factorization.

231402551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36361.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 231402551 is about 15211.9213447874. The cubic root of 231402551 is about 613.9354540686.

Adding to 231402551 its reverse (155204132), we get a palindrome (386606683).

The spelling of 231402551 in words is "two hundred thirty-one million, four hundred two thousand, five hundred fifty-one".