231117157415 has 8 divisors (see below), whose sum is σ = 277364361408. Its totient is φ = 184877877600.

The previous prime is 231117157409. The next prime is 231117157421. The reversal of 231117157415 is 514751711132.

It is an interprime number because it is at equal distance from previous prime (231117157409) and next prime (231117157421).

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-231117157415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916687 + ... + 2033696.

It is an arithmetic number, because the mean of its divisors is an integer number (34670545176).

Almost surely, 2^231117157415 is an apocalyptic number.

231117157415 is a deficient number, since it is larger than the sum of its proper divisors (46247203993).

231117157415 is a wasteful number, since it uses less digits than its factorization.

231117157415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962089.

The product of its digits is 29400, while the sum is 38.

Adding to 231117157415 its reverse (514751711132), we get a palindrome (745868868547).

The spelling of 231117157415 in words is "two hundred thirty-one billion, one hundred seventeen million, one hundred fifty-seven thousand, four hundred fifteen".