231311002 has 16 divisors (see below), whose sum is σ = 373915080. Its totient is φ = 106684992.

The previous prime is 231310991. The next prime is 231311009. The reversal of 231311002 is 200113132.

231311002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 230462761 + 848241 = 15181^2 + 921^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (231311009) 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, 58108 + ... + 61960.

Almost surely, 2^231311002 is an apocalyptic number.

231311002 is a deficient number, since it is larger than the sum of its proper divisors (142604078).

231311002 is a wasteful number, since it uses less digits than its factorization.

231311002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 231311002 is about 15208.9119268934. The cubic root of 231311002 is about 613.8544803278.

Adding to 231311002 its reverse (200113132), we get a palindrome (431424134).

It can be divided in two parts, 23 and 1311002, that added together give a square (1311025 = 1145²).

The spelling of 231311002 in words is "two hundred thirty-one million, three hundred eleven thousand, two".