32400091331 has 2 divisors, whose sum is σ = 32400091332. Its totient is φ = 32400091330.

The previous prime is 32400091327. The next prime is 32400091357. The reversal of 32400091331 is 13319000423.

It is a happy number.

It is an a-pointer prime, because the next prime (32400091357) can be obtained adding 32400091331 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 32400091331 - 2² = 32400091327 is a prime.

It is a super-2 number, since 2×32400091331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 32400091331.

It is not a weakly prime, because it can be changed into another prime (32400091391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200045665 + 16200045666.

It is an arithmetic number, because the mean of its divisors is an integer number (16200045666).

Almost surely, 2^32400091331 is an apocalyptic number.

32400091331 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400091331 is an equidigital number, since it uses as much as digits as its factorization.

32400091331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 32400091331 its reverse (13319000423), we get a palindrome (45719091754).

The spelling of 32400091331 in words is "thirty-two billion, four hundred million, ninety-one thousand, three hundred thirty-one".