20100531431 has 2 divisors, whose sum is σ = 20100531432. Its totient is φ = 20100531430.

The previous prime is 20100531421. The next prime is 20100531443. The reversal of 20100531431 is 13413500102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100531431 - 2¹⁴ = 20100515047 is a prime.

It is a super-2 number, since 2×20100531431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100531421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050265715 + 10050265716.

It is an arithmetic number, because the mean of its divisors is an integer number (10050265716).

Almost surely, 2^20100531431 is an apocalyptic number.

20100531431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100531431 is an equidigital number, since it uses as much as digits as its factorization.

20100531431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 20100531431 in words is "twenty billion, one hundred million, five hundred thirty-one thousand, four hundred thirty-one".