2100536723515 has 4 divisors (see below), whose sum is σ = 2520644068224. Its totient is φ = 1680429378808.

The previous prime is 2100536723507. The next prime is 2100536723567. The reversal of 2100536723515 is 5153276350012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2100536723515 - 2³ = 2100536723507 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210053672347 + ... + 210053672356.

It is an arithmetic number, because the mean of its divisors is an integer number (630161017056).

Almost surely, 2^{2100536723515} is an apocalyptic number.

2100536723515 is a deficient number, since it is larger than the sum of its proper divisors (420107344709).

2100536723515 is an equidigital number, since it uses as much as digits as its factorization.

2100536723515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420107344708.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 2100536723515 in words is "two trillion, one hundred billion, five hundred thirty-six million, seven hundred twenty-three thousand, five hundred fifteen".