2132745521 has 4 divisors (see below), whose sum is σ = 2206288500. Its totient is φ = 2059202544.

The previous prime is 2132745491. The next prime is 2132745529. The reversal of 2132745521 is 1255472312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1286226496 + 846519025 = 35864^2 + 29095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2132745521 - 2⁶ = 2132745457 is a prime.

It is a super-2 number, since 2×2132745521² = 9097206914691122882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2132745529) 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 3 ways as a sum of consecutive naturals, for example, 36771446 + ... + 36771503.

It is an arithmetic number, because the mean of its divisors is an integer number (551572125).

Almost surely, 2^2132745521 is an apocalyptic number.

It is an amenable number.

2132745521 is a deficient number, since it is larger than the sum of its proper divisors (73542979).

2132745521 is an equidigital number, since it uses as much as digits as its factorization.

2132745521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73542978.

The product of its digits is 16800, while the sum is 32.

The square root of 2132745521 is about 46181.6578416150. The cubic root of 2132745521 is about 1287.2009339115.

The spelling of 2132745521 in words is "two billion, one hundred thirty-two million, seven hundred forty-five thousand, five hundred twenty-one".