7221051515 has 8 divisors (see below), whose sum is σ = 8828757648. Its totient is φ = 5667844000.

The previous prime is 7221051499. The next prime is 7221051571. The reversal of 7221051515 is 5151501227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7221051515 - 2⁴ = 7221051499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13624361 + ... + 13624890.

It is an arithmetic number, because the mean of its divisors is an integer number (1103594706).

Almost surely, 2^7221051515 is an apocalyptic number.

7221051515 is a deficient number, since it is larger than the sum of its proper divisors (1607706133).

7221051515 is a wasteful number, since it uses less digits than its factorization.

7221051515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27249309.

The product of its (nonzero) digits is 3500, while the sum is 29.

The square root of 7221051515 is about 84976.7704434571. The cubic root of 7221051515 is about 1932.8588837920.

The spelling of 7221051515 in words is "seven billion, two hundred twenty-one million, fifty-one thousand, five hundred fifteen".