232221201431537 has 2 divisors, whose sum is σ = 232221201431538. Its totient is φ = 232221201431536.

The previous prime is 232221201431507. The next prime is 232221201431551. The reversal of 232221201431537 is 735134102122232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127529341966321 + 104691859465216 = 11292889^2 + 10231904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232221201431537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 232221201431537.

It is not a weakly prime, because it can be changed into another prime (232221201431507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116110600715768 + 116110600715769.

It is an arithmetic number, because the mean of its divisors is an integer number (116110600715769).

Almost surely, 2^{232221201431537} is an apocalyptic number.

It is an amenable number.

232221201431537 is a deficient number, since it is larger than the sum of its proper divisors (1).

232221201431537 is an equidigital number, since it uses as much as digits as its factorization.

232221201431537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 232221201431537 its reverse (735134102122232), we get a palindrome (967355303553769).

The spelling of 232221201431537 in words is "two hundred thirty-two trillion, two hundred twenty-one billion, two hundred one million, four hundred thirty-one thousand, five hundred thirty-seven".