231250011530 has 32 divisors (see below), whose sum is σ = 420760465920. Its totient is φ = 91502812800.

The previous prime is 231250011523. The next prime is 231250011547. The reversal of 231250011530 is 35110052132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231250011496 and 231250011505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40502 + ... + 681278.

It is an arithmetic number, because the mean of its divisors is an integer number (13148764560).

Almost surely, 2^231250011530 is an apocalyptic number.

231250011530 is a deficient number, since it is larger than the sum of its proper divisors (189510454390).

231250011530 is a wasteful number, since it uses less digits than its factorization.

231250011530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641174.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 231250011530 its reverse (35110052132), we get a palindrome (266360063662).

The spelling of 231250011530 in words is "two hundred thirty-one billion, two hundred fifty million, eleven thousand, five hundred thirty".