2151530525 has 12 divisors (see below), whose sum is σ = 2671882932. Its totient is φ = 1718653440.

The previous prime is 2151530471. The next prime is 2151530581. The reversal of 2151530525 is 5250351512.

It can be written as a sum of positive squares in 6 ways, for example, as 625300036 + 1526230489 = 25006^2 + 39067^2 .

It is not a de Polignac number, because 2151530525 - 2¹⁸ = 2151268381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47114 + ... + 80763.

It is an arithmetic number, because the mean of its divisors is an integer number (222656911).

Almost surely, 2^2151530525 is an apocalyptic number.

2151530525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151530525 is a deficient number, since it is larger than the sum of its proper divisors (520352407).

2151530525 is a wasteful number, since it uses less digits than its factorization.

2151530525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128560 (or 128555 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 2151530525 is about 46384.5936168465. The cubic root of 2151530525 is about 1290.9690703250.

The spelling of 2151530525 in words is "two billion, one hundred fifty-one million, five hundred thirty thousand, five hundred twenty-five".