2115402001 has 4 divisors (see below), whose sum is σ = 2122930404. Its totient is φ = 2107873600.

The previous prime is 2115401969. The next prime is 2115402007. The reversal of 2115402001 is 1002045112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1254859776 + 860542225 = 35424^2 + 29335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115402001 - 2⁵ = 2115401969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115402007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3763780 + ... + 3764341.

It is an arithmetic number, because the mean of its divisors is an integer number (530732601).

Almost surely, 2^2115402001 is an apocalyptic number.

It is an amenable number.

2115402001 is a deficient number, since it is larger than the sum of its proper divisors (7528403).

2115402001 is an equidigital number, since it uses as much as digits as its factorization.

2115402001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7528402.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2115402001 is about 45993.4995515671. The cubic root of 2115402001 is about 1283.7022535397.

Adding to 2115402001 its reverse (1002045112), we get a palindrome (3117447113).

The spelling of 2115402001 in words is "two billion, one hundred fifteen million, four hundred two thousand, one".