72205507 has 4 divisors (see below), whose sum is σ = 78769656. Its totient is φ = 65641360.

The previous prime is 72205501. The next prime is 72205513. The reversal of 72205507 is 70550227.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72205501) and next prime (72205513).

It is a cyclic number.

It is not a de Polignac number, because 72205507 - 2³ = 72205499 is a prime.

It is a super-2 number, since 2×72205507² = 10427270482254098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72205501) 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, 3282058 + ... + 3282079.

It is an arithmetic number, because the mean of its divisors is an integer number (19692414).

Almost surely, 2^72205507 is an apocalyptic number.

72205507 is a deficient number, since it is larger than the sum of its proper divisors (6564149).

72205507 is a wasteful number, since it uses less digits than its factorization.

72205507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564148.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 72205507 is about 8497.3823616453. The cubic root of 72205507 is about 416.4121958364.

The spelling of 72205507 in words is "seventy-two million, two hundred five thousand, five hundred seven".