2221252340 has 24 divisors (see below), whose sum is σ = 4734254112. Its totient is φ = 875239200.

The previous prime is 2221252309. The next prime is 2221252403. The reversal of 2221252340 is 432521222.

2221252340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827486 + ... + 830165.

It is an arithmetic number, because the mean of its divisors is an integer number (197260588).

Almost surely, 2^2221252340 is an apocalyptic number.

2221252340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221252340 is an abundant number, since it is smaller than the sum of its proper divisors (2513001772).

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

2221252340 is a wasteful number, since it uses less digits than its factorization.

2221252340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657727 (or 1657725 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2221252340 is about 47130.1638019644. The cubic root of 2221252340 is about 1304.7660047370.

Adding to 2221252340 its reverse (432521222), we get a palindrome (2653773562).

The spelling of 2221252340 in words is "two billion, two hundred twenty-one million, two hundred fifty-two thousand, three hundred forty".