161023233431431 has 16 divisors (see below), whose sum is σ = 190558752632640. Its totient is φ = 133130087112960.

The previous prime is 161023233431363. The next prime is 161023233431477. The reversal of 161023233431431 is 134134332320161.

It is not a de Polignac number, because 161023233431431 - 2¹⁹ = 161023232907143 is a prime.

It is a super-2 number, since 2×161023233431431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161023233431231) 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, 388244206 + ... + 388658731.

It is an arithmetic number, because the mean of its divisors is an integer number (11909922039540).

Almost surely, 2^{161023233431431} is an apocalyptic number.

161023233431431 is a deficient number, since it is larger than the sum of its proper divisors (29535519201209).

161023233431431 is a wasteful number, since it uses less digits than its factorization.

161023233431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776903994.

The product of its (nonzero) digits is 93312, while the sum is 37.

Adding to 161023233431431 its reverse (134134332320161), we get a palindrome (295157565751592).

The spelling of 161023233431431 in words is "one hundred sixty-one trillion, twenty-three billion, two hundred thirty-three million, four hundred thirty-one thousand, four hundred thirty-one".