132561998 has 4 divisors (see below), whose sum is σ = 198843000. Its totient is φ = 66280998.

The previous prime is 132561997. The next prime is 132562019. The reversal of 132561998 is 899165231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132561997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33140498 + ... + 33140501.

It is an arithmetic number, because the mean of its divisors is an integer number (49710750).

Almost surely, 2^132561998 is an apocalyptic number.

132561998 is a deficient number, since it is larger than the sum of its proper divisors (66281002).

132561998 is an equidigital number, since it uses as much as digits as its factorization.

132561998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66281001.

The product of its digits is 116640, while the sum is 44.

The square root of 132561998 is about 11513.5571393032. The cubic root of 132561998 is about 509.8859132223.

The spelling of 132561998 in words is "one hundred thirty-two million, five hundred sixty-one thousand, nine hundred ninety-eight".