3231661553 has 2 divisors, whose sum is σ = 3231661554. Its totient is φ = 3231661552.

The previous prime is 3231661547. The next prime is 3231661561. The reversal of 3231661553 is 3551661323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3215797264 + 15864289 = 56708^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 3231661553 - 2¹⁴ = 3231645169 is a prime.

It is not a weakly prime, because it can be changed into another prime (3231661513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615830776 + 1615830777.

It is an arithmetic number, because the mean of its divisors is an integer number (1615830777).

Almost surely, 2^3231661553 is an apocalyptic number.

It is an amenable number.

3231661553 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231661553 is an equidigital number, since it uses as much as digits as its factorization.

3231661553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 35.

The square root of 3231661553 is about 56847.7049052994. The cubic root of 3231661553 is about 1478.4567479688.

The spelling of 3231661553 in words is "three billion, two hundred thirty-one million, six hundred sixty-one thousand, five hundred fifty-three".