1632131261 has 2 divisors, whose sum is σ = 1632131262. Its totient is φ = 1632131260.

The previous prime is 1632131213. The next prime is 1632131273. The reversal of 1632131261 is 1621312361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1368556036 + 263575225 = 36994^2 + 16235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1632131261 - 2⁶ = 1632131197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1632131261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1632131201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 816065630 + 816065631.

It is an arithmetic number, because the mean of its divisors is an integer number (816065631).

Almost surely, 2^1632131261 is an apocalyptic number.

It is an amenable number.

1632131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1632131261 is an equidigital number, since it uses as much as digits as its factorization.

1632131261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1632131261 is about 40399.6443177412. The cubic root of 1632131261 is about 1177.3846271833.

The spelling of 1632131261 in words is "one billion, six hundred thirty-two million, one hundred thirty-one thousand, two hundred sixty-one".