2215812401 has 4 divisors (see below), whose sum is σ = 2417249904. Its totient is φ = 2014374900.

The previous prime is 2215812397. The next prime is 2215812457. The reversal of 2215812401 is 1042185122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2215812401 - 2² = 2215812397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215812101) 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, 100718735 + ... + 100718756.

It is an arithmetic number, because the mean of its divisors is an integer number (604312476).

Almost surely, 2^2215812401 is an apocalyptic number.

It is an amenable number.

2215812401 is a deficient number, since it is larger than the sum of its proper divisors (201437503).

2215812401 is a wasteful number, since it uses less digits than its factorization.

2215812401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201437502.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 2215812401 is about 47072.4165621439. The cubic root of 2215812401 is about 1303.6999920271.

Adding to 2215812401 its reverse (1042185122), we get a palindrome (3257997523).

The spelling of 2215812401 in words is "two billion, two hundred fifteen million, eight hundred twelve thousand, four hundred one".