72275515 has 16 divisors (see below), whose sum is σ = 94723776. Its totient is φ = 52617600.

The previous prime is 72275507. The next prime is 72275537. The reversal of 72275515 is 51557227.

It is not a de Polignac number, because 72275515 - 2³ = 72275507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3216 + ... + 12445.

It is an arithmetic number, because the mean of its divisors is an integer number (5920236).

Almost surely, 2^72275515 is an apocalyptic number.

72275515 is a deficient number, since it is larger than the sum of its proper divisors (22448261).

72275515 is a wasteful number, since it uses less digits than its factorization.

72275515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15750.

The product of its digits is 24500, while the sum is 34.

The square root of 72275515 is about 8501.5007498676. The cubic root of 72275515 is about 416.5467320587.

The spelling of 72275515 in words is "seventy-two million, two hundred seventy-five thousand, five hundred fifteen".