2532277721 has 4 divisors (see below), whose sum is σ = 2681235252. Its totient is φ = 2383320192.

The previous prime is 2532277717. The next prime is 2532277739. The reversal of 2532277721 is 1277722352.

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 872611600 + 1659666121 = 29540^2 + 40739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2532277721 - 2² = 2532277717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2532277921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74478740 + ... + 74478773.

It is an arithmetic number, because the mean of its divisors is an integer number (670308813).

Almost surely, 2^2532277721 is an apocalyptic number.

It is an amenable number.

2532277721 is a deficient number, since it is larger than the sum of its proper divisors (148957531).

2532277721 is a wasteful number, since it uses less digits than its factorization.

2532277721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148957530.

The product of its digits is 82320, while the sum is 38.

The square root of 2532277721 is about 50321.7420306571. The cubic root of 2532277721 is about 1363.0248634199.

The spelling of 2532277721 in words is "two billion, five hundred thirty-two million, two hundred seventy-seven thousand, seven hundred twenty-one".