2472007721 has 4 divisors (see below), whose sum is σ = 2485818000. Its totient is φ = 2458197444.

The previous prime is 2472007717. The next prime is 2472007751. The reversal of 2472007721 is 1277002742.

It is a happy number.

2472007721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1277002742 = 2 ⋅638501371.

It is a cyclic number.

It is not a de Polignac number, because 2472007721 - 2² = 2472007717 is a prime.

It is a super-2 number, since 2×2472007721² = 12221644345367227682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2472007751) 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, 6904871 + ... + 6905228.

It is an arithmetic number, because the mean of its divisors is an integer number (621454500).

Almost surely, 2^2472007721 is an apocalyptic number.

It is an amenable number.

2472007721 is a deficient number, since it is larger than the sum of its proper divisors (13810279).

2472007721 is a wasteful number, since it uses less digits than its factorization.

2472007721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13810278.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 2472007721 is about 49719.2892246058. The cubic root of 2472007721 is about 1352.1242680803.

The spelling of 2472007721 in words is "two billion, four hundred seventy-two million, seven thousand, seven hundred twenty-one".