31241320143 has 16 divisors (see below), whose sum is σ = 45579222912. Its totient is φ = 18876924000.

The previous prime is 31241320093. The next prime is 31241320211. The reversal of 31241320143 is 34102314213.

It is a happy number.

It is not a de Polignac number, because 31241320143 - 2⁸ = 31241319887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241322143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1419148 + ... + 1440993.

It is an arithmetic number, because the mean of its divisors is an integer number (2848701432).

Almost surely, 2^31241320143 is an apocalyptic number.

31241320143 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31241320143 is a deficient number, since it is larger than the sum of its proper divisors (14337902769).

31241320143 is a wasteful number, since it uses less digits than its factorization.

31241320143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860486.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31241320143 its reverse (34102314213), we get a palindrome (65343634356).

The spelling of 31241320143 in words is "thirty-one billion, two hundred forty-one million, three hundred twenty thousand, one hundred forty-three".