2351221140 has 48 divisors (see below), whose sum is σ = 6630805440. Its totient is φ = 622479360.

The previous prime is 2351221109. The next prime is 2351221141. The reversal of 2351221140 is 411221532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2351221141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132621 + ... + 149300.

It is an arithmetic number, because the mean of its divisors is an integer number (138141780).

Almost surely, 2^2351221140 is an apocalyptic number.

2351221140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2351221140 is an abundant number, since it is smaller than the sum of its proper divisors (4279584300).

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

2351221140 is a wasteful number, since it uses less digits than its factorization.

2351221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282072 (or 282070 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2351221140 is about 48489.3920357845. The cubic root of 2351221140 is about 1329.7331403461.

Adding to 2351221140 its reverse (411221532), we get a palindrome (2762442672).

The spelling of 2351221140 in words is "two billion, three hundred fifty-one million, two hundred twenty-one thousand, one hundred forty".