162501998 has 4 divisors (see below), whose sum is σ = 243753000. Its totient is φ = 81250998.

The previous prime is 162501991. The next prime is 162502033. The reversal of 162501998 is 899105261.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162501991) 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, 40625498 + ... + 40625501.

It is an arithmetic number, because the mean of its divisors is an integer number (60938250).

Almost surely, 2^162501998 is an apocalyptic number.

162501998 is a deficient number, since it is larger than the sum of its proper divisors (81251002).

162501998 is an equidigital number, since it uses as much as digits as its factorization.

162501998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81251001.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 162501998 is about 12747.6271517487. The cubic root of 162501998 is about 545.6986780373.

The spelling of 162501998 in words is "one hundred sixty-two million, five hundred one thousand, nine hundred ninety-eight".