2051133440 has 52 divisors (see below), whose sum is σ = 4922168484. Its totient is φ = 820445184.

The previous prime is 2051133437. The next prime is 2051133457. The reversal of 2051133440 is 443311502.

It can be written as a sum of positive squares in 2 ways, for example, as 1335463936 + 715669504 = 36544^2 + 26752^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29597 + ... + 70556.

Almost surely, 2^2051133440 is an apocalyptic number.

2051133440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051133440 is an abundant number, since it is smaller than the sum of its proper divisors (2871035044).

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

2051133440 is an equidigital number, since it uses as much as digits as its factorization.

2051133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100182 (or 100160 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2051133440 is about 45289.4407119364. The cubic root of 2051133440 is about 1270.5681711778.

Adding to 2051133440 its reverse (443311502), we get a palindrome (2494444942).

The spelling of 2051133440 in words is "two billion, fifty-one million, one hundred thirty-three thousand, four hundred forty".