31200002231 has 4 divisors (see below), whose sum is σ = 31264068432. Its totient is φ = 31135936032.

The previous prime is 31200002219. The next prime is 31200002279. The reversal of 31200002231 is 13220000213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31200002231 - 2¹⁸ = 31199740087 is a prime.

It is a super-2 number, since 2×31200002231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200002831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32032370 + ... + 32033343.

It is an arithmetic number, because the mean of its divisors is an integer number (7816017108).

Almost surely, 2^31200002231 is an apocalyptic number.

31200002231 is a deficient number, since it is larger than the sum of its proper divisors (64066201).

31200002231 is an equidigital number, since it uses as much as digits as its factorization.

31200002231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64066200.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31200002231 its reverse (13220000213), we get a palindrome (44420002444).

The spelling of 31200002231 in words is "thirty-one billion, two hundred million, two thousand, two hundred thirty-one".