2221540401 has 32 divisors (see below), whose sum is σ = 3166087680. Its totient is φ = 1381536000.

The previous prime is 2221540369. The next prime is 2221540411. The reversal of 2221540401 is 1040451222.

It is not a de Polignac number, because 2221540401 - 2⁵ = 2221540369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221540411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1896546 + ... + 1897716.

It is an arithmetic number, because the mean of its divisors is an integer number (98940240).

Almost surely, 2^2221540401 is an apocalyptic number.

It is an amenable number.

2221540401 is a deficient number, since it is larger than the sum of its proper divisors (944547279).

2221540401 is a wasteful number, since it uses less digits than its factorization.

2221540401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2221540401 is about 47133.2197181563. The cubic root of 2221540401 is about 1304.8224047457.

Adding to 2221540401 its reverse (1040451222), we get a palindrome (3261991623).

The spelling of 2221540401 in words is "two billion, two hundred twenty-one million, five hundred forty thousand, four hundred one".