31200030103431 has 16 divisors (see below), whose sum is σ = 50045161068800. Its totient is φ = 16890241860288.

The previous prime is 31200030103421. The next prime is 31200030103433. The reversal of 31200030103431 is 13430103000213.

It is not a de Polignac number, because 31200030103431 - 2¹³ = 31200030095239 is a prime.

It is a super-2 number, since 2×31200030103431² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31200030103398 and 31200030103407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200030103433) 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, 39097781686 + ... + 39097782483.

It is an arithmetic number, because the mean of its divisors is an integer number (3127822566800).

Almost surely, 2^{31200030103431} is an apocalyptic number.

31200030103431 is a deficient number, since it is larger than the sum of its proper divisors (18845130965369).

31200030103431 is a wasteful number, since it uses less digits than its factorization.

31200030103431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78195564198.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31200030103431 its reverse (13430103000213), we get a palindrome (44630133103644).

The spelling of 31200030103431 in words is "thirty-one trillion, two hundred billion, thirty million, one hundred three thousand, four hundred thirty-one".