20231045431531 has 16 divisors (see below), whose sum is σ = 22667259011040. Its totient is φ = 17894359918080.

The previous prime is 20231045431517. The next prime is 20231045431559. The reversal of 20231045431531 is 13513454013202.

It is a cyclic number.

It is not a de Polignac number, because 20231045431531 - 2¹³ = 20231045423339 is a prime.

It is a super-2 number, since 2×20231045431531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20231045431931) 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, 17355315 + ... + 18484291.

It is an arithmetic number, because the mean of its divisors is an integer number (1416703688190).

Almost surely, 2^{20231045431531} is an apocalyptic number.

20231045431531 is a deficient number, since it is larger than the sum of its proper divisors (2436213579509).

20231045431531 is a wasteful number, since it uses less digits than its factorization.

20231045431531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173054.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 20231045431531 its reverse (13513454013202), we get a palindrome (33744499444733).

The spelling of 20231045431531 in words is "twenty trillion, two hundred thirty-one billion, forty-five million, four hundred thirty-one thousand, five hundred thirty-one".