231202321040 has 40 divisors (see below), whose sum is σ = 548982541440. Its totient is φ = 90513247616.

The previous prime is 231202321003. The next prime is 231202321073. The reversal of 231202321040 is 40123202132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 30741230 + ... + 30748749.

It is an arithmetic number, because the mean of its divisors is an integer number (13724563536).

Almost surely, 2^231202321040 is an apocalyptic number.

231202321040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231202321040 is an abundant number, since it is smaller than the sum of its proper divisors (317780220400).

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

231202321040 is a wasteful number, since it uses less digits than its factorization.

231202321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61490039 (or 61490033 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231202321040 its reverse (40123202132), we get a palindrome (271325523172).

The spelling of 231202321040 in words is "two hundred thirty-one billion, two hundred two million, three hundred twenty-one thousand, forty".