2141998501 has 4 divisors (see below), whose sum is σ = 2142109900. Its totient is φ = 2141887104.

The previous prime is 2141998499. The next prime is 2141998519. The reversal of 2141998501 is 1058991412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 701720100 + 1440278401 = 26490^2 + 37951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2141998501 - 2¹ = 2141998499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141998531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18636 + ... + 68053.

It is an arithmetic number, because the mean of its divisors is an integer number (535527475).

Almost surely, 2^2141998501 is an apocalyptic number.

It is an amenable number.

2141998501 is a deficient number, since it is larger than the sum of its proper divisors (111399).

2141998501 is an equidigital number, since it uses as much as digits as its factorization.

2141998501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111398.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 2141998501 is about 46281.7296673320. The cubic root of 2141998501 is about 1289.0597681654.

The spelling of 2141998501 in words is "two billion, one hundred forty-one million, nine hundred ninety-eight thousand, five hundred one".