231402124140 has 96 divisors (see below), whose sum is σ = 713826812160. Its totient is φ = 55542048000.

The previous prime is 231402124123. The next prime is 231402124141. The reversal of 231402124140 is 41421204132.

It is a self number, because there is not a number n which added to its sum of digits gives 231402124140.

It is not an unprimeable number, because it can be changed into a prime (231402124141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1669030 + ... + 1802349.

It is an arithmetic number, because the mean of its divisors is an integer number (7435695960).

Almost surely, 2^231402124140 is an apocalyptic number.

231402124140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231402124140 is an abundant number, since it is smaller than the sum of its proper divisors (482424688020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231402124140 is a wasteful number, since it uses less digits than its factorization.

231402124140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471503 (or 3471501 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 231402124140 its reverse (41421204132), we get a palindrome (272823328272).

The spelling of 231402124140 in words is "two hundred thirty-one billion, four hundred two million, one hundred twenty-four thousand, one hundred forty".