7216280409 has 16 divisors (see below), whose sum is σ = 10696093184. Its totient is φ = 4297536000.

The previous prime is 7216280387. The next prime is 7216280441. The reversal of 7216280409 is 9040826127.

It is not a de Polignac number, because 7216280409 - 2⁹ = 7216279897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7216280609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2983192 + ... + 2985609.

It is an arithmetic number, because the mean of its divisors is an integer number (668505824).

Almost surely, 2^7216280409 is an apocalyptic number.

It is an amenable number.

7216280409 is a deficient number, since it is larger than the sum of its proper divisors (3479812775).

7216280409 is a wasteful number, since it uses less digits than its factorization.

7216280409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968848.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 7216280409 is about 84948.6928033622. The cubic root of 7216280409 is about 1932.4330960160.

The spelling of 7216280409 in words is "seven billion, two hundred sixteen million, two hundred eighty thousand, four hundred nine".