231789196501 has 2 divisors, whose sum is σ = 231789196502. Its totient is φ = 231789196500.

The previous prime is 231789196493. The next prime is 231789196537. The reversal of 231789196501 is 105691987132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166626423601 + 65162772900 = 408199^2 + 255270^2 .

It is a cyclic number.

It is not a de Polignac number, because 231789196501 - 2³ = 231789196493 is a prime.

It is a super-2 number, since 2×231789196501² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231789196571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115894598250 + 115894598251.

It is an arithmetic number, because the mean of its divisors is an integer number (115894598251).

Almost surely, 2^231789196501 is an apocalyptic number.

It is an amenable number.

231789196501 is a deficient number, since it is larger than the sum of its proper divisors (1).

231789196501 is an equidigital number, since it uses as much as digits as its factorization.

231789196501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 231789196501 in words is "two hundred thirty-one billion, seven hundred eighty-nine million, one hundred ninety-six thousand, five hundred one".