2051641509 has 16 divisors (see below), whose sum is σ = 2802079488. Its totient is φ = 1334656512.

The previous prime is 2051641507. The next prime is 2051641523. The reversal of 2051641509 is 9051461502.

It is not a de Polignac number, because 2051641509 - 2¹ = 2051641507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2051641509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051641507) 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, 25929 + ... + 69105.

It is an arithmetic number, because the mean of its divisors is an integer number (175129968).

Almost surely, 2^2051641509 is an apocalyptic number.

It is an amenable number.

2051641509 is a deficient number, since it is larger than the sum of its proper divisors (750437979).

2051641509 is a wasteful number, since it uses less digits than its factorization.

2051641509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43564.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2051641509 is about 45295.0494977100. The cubic root of 2051641509 is about 1270.6730697662.

The spelling of 2051641509 in words is "two billion, fifty-one million, six hundred forty-one thousand, five hundred nine".