2051520465 has 16 divisors (see below), whose sum is σ = 3395620800. Its totient is φ = 1056414912.

The previous prime is 2051520409. The next prime is 2051520473. The reversal of 2051520465 is 5640251502.

It is not a de Polignac number, because 2051520465 - 2²⁰ = 2050471889 is a prime.

It is a super-3 number, since 3×2051520465³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2357635 + ... + 2358504.

It is an arithmetic number, because the mean of its divisors is an integer number (212226300).

Almost surely, 2^2051520465 is an apocalyptic number.

It is an amenable number.

2051520465 is a deficient number, since it is larger than the sum of its proper divisors (1344100335).

2051520465 is a wasteful number, since it uses less digits than its factorization.

2051520465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716176.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2051520465 is about 45293.7133054909. The cubic root of 2051520465 is about 1270.6480799592.

Adding to 2051520465 its reverse (5640251502), we get a palindrome (7691771967).

The spelling of 2051520465 in words is "two billion, fifty-one million, five hundred twenty thousand, four hundred sixty-five".