31400020223143 has 16 divisors (see below), whose sum is σ = 36889825666176. Its totient is φ = 26349459164640.

The previous prime is 31400020223141. The next prime is 31400020223233. The reversal of 31400020223143 is 34132202000413.

It is a cyclic number.

It is not a de Polignac number, because 31400020223143 - 2¹ = 31400020223141 is a prime.

It is a super-2 number, since 2×31400020223143² (a number of 28 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 (31400020223141) 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, 18861496 + ... + 20458642.

It is an arithmetic number, because the mean of its divisors is an integer number (2305614104136).

Almost surely, 2^{31400020223143} is an apocalyptic number.

31400020223143 is a deficient number, since it is larger than the sum of its proper divisors (5489805443033).

31400020223143 is a wasteful number, since it uses less digits than its factorization.

31400020223143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734654.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31400020223143 its reverse (34132202000413), we get a palindrome (65532222223556).

The spelling of 31400020223143 in words is "thirty-one trillion, four hundred billion, twenty million, two hundred twenty-three thousand, one hundred forty-three".