2051297520 has 80 divisors (see below), whose sum is σ = 6733095840. Its totient is φ = 514834432.

The previous prime is 2051297491. The next prime is 2051297533. The reversal of 2051297520 is 257921502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247305 + ... + 255464.

It is an arithmetic number, because the mean of its divisors is an integer number (84163698).

Almost surely, 2^2051297520 is an apocalyptic number.

2051297520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051297520 is an abundant number, since it is smaller than the sum of its proper divisors (4681798320).

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

2051297520 is a wasteful number, since it uses less digits than its factorization.

2051297520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502802 (or 502796 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 2051297520 is about 45291.2521354842. The cubic root of 2051297520 is about 1270.6020498881.

The spelling of 2051297520 in words is "two billion, fifty-one million, two hundred ninety-seven thousand, five hundred twenty".