2051405525 has 12 divisors (see below), whose sum is σ = 2739415812. Its totient is φ = 1514883840.

The previous prime is 2051405497. The next prime is 2051405527. The reversal of 2051405525 is 5255041502.

It can be written as a sum of positive squares in 6 ways, for example, as 903483364 + 1147922161 = 30058^2 + 33881^2 .

It is not a de Polignac number, because 2051405525 - 2¹⁶ = 2051339989 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051405527) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3155684 + ... + 3156333.

It is an arithmetic number, because the mean of its divisors is an integer number (228284651).

Almost surely, 2^2051405525 is an apocalyptic number.

2051405525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2051405525 is a deficient number, since it is larger than the sum of its proper divisors (688010287).

2051405525 is a wasteful number, since it uses less digits than its factorization.

2051405525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312040 (or 6312035 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2051405525 is about 45292.4444582096. Note that the first 4 decimals coincide. The cubic root of 2051405525 is about 1270.6243494269.

The spelling of 2051405525 in words is "two billion, fifty-one million, four hundred five thousand, five hundred twenty-five".