2221251402 has 16 divisors (see below), whose sum is σ = 4508809632. Its totient is φ = 729366000.

The previous prime is 2221251391. The next prime is 2221251407. The reversal of 2221251402 is 2041521222.

It is not an unprimeable number, because it can be changed into a prime (2221251407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2762349 + ... + 2763152.

It is an arithmetic number, because the mean of its divisors is an integer number (281800602).

Almost surely, 2^2221251402 is an apocalyptic number.

2221251402 is an abundant number, since it is smaller than the sum of its proper divisors (2287558230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221251402 is a wasteful number, since it uses less digits than its factorization.

2221251402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525573.

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

The square root of 2221251402 is about 47130.1538507992. The cubic root of 2221251402 is about 1304.7658210763.

Adding to 2221251402 its reverse (2041521222), we get a palindrome (4262772624).

The spelling of 2221251402 in words is "two billion, two hundred twenty-one million, two hundred fifty-one thousand, four hundred two".