231501013 has 8 divisors (see below), whose sum is σ = 235301760. Its totient is φ = 227710560.

The previous prime is 231501001. The next prime is 231501029. The reversal of 231501013 is 310105132.

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 231501013 - 2⁵ = 231500981 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 (231501043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52068 + ... + 56338.

It is an arithmetic number, because the mean of its divisors is an integer number (29412720).

Almost surely, 2^231501013 is an apocalyptic number.

It is an amenable number.

231501013 is a deficient number, since it is larger than the sum of its proper divisors (3800747).

231501013 is an equidigital number, since it uses as much as digits as its factorization.

231501013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 231501013 is about 15215.1573439120. The cubic root of 231501013 is about 614.0225184228.

Adding to 231501013 its reverse (310105132), we get a palindrome (541606145).

The spelling of 231501013 in words is "two hundred thirty-one million, five hundred one thousand, thirteen".