2251333240 has 32 divisors (see below), whose sum is σ = 5455154880. Its totient is φ = 831261312.

The previous prime is 2251333207. The next prime is 2251333291. The reversal of 2251333240 is 423331522.

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, 2164224 + ... + 2165263.

It is an arithmetic number, because the mean of its divisors is an integer number (170473590).

Almost surely, 2^2251333240 is an apocalyptic number.

2251333240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2251333240 is an abundant number, since it is smaller than the sum of its proper divisors (3203821640).

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

2251333240 is a wasteful number, since it uses less digits than its factorization.

2251333240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329511 (or 4329507 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 2251333240 is about 47448.2164048344. The cubic root of 2251333240 is about 1310.6294665373.

Adding to 2251333240 its reverse (423331522), we get a palindrome (2674664762).

The spelling of 2251333240 in words is "two billion, two hundred fifty-one million, three hundred thirty-three thousand, two hundred forty".