231616451 has 8 divisors (see below), whose sum is σ = 256815408. Its totient is φ = 207108000.

The previous prime is 231616433. The next prime is 231616471. The reversal of 231616451 is 154616132.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-231616451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231616471) 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, 171920 + ... + 173261.

It is an arithmetic number, because the mean of its divisors is an integer number (32101926).

Almost surely, 2^231616451 is an apocalyptic number.

231616451 is a deficient number, since it is larger than the sum of its proper divisors (25198957).

231616451 is a wasteful number, since it uses less digits than its factorization.

231616451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345253.

The product of its digits is 4320, while the sum is 29.

The square root of 231616451 is about 15218.9503908778. The cubic root of 231616451 is about 614.1245622571.

The spelling of 231616451 in words is "two hundred thirty-one million, six hundred sixteen thousand, four hundred fifty-one".