72503522 has 32 divisors (see below), whose sum is σ = 134918784. Its totient is φ = 28454400.

The previous prime is 72503503. The next prime is 72503531. The reversal of 72503522 is 22530527.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 72503491 and 72503500.

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, 22322 + ... + 25362.

It is an arithmetic number, because the mean of its divisors is an integer number (4216212).

Almost surely, 2^72503522 is an apocalyptic number.

72503522 is a deficient number, since it is larger than the sum of its proper divisors (62415262).

72503522 is a wasteful number, since it uses less digits than its factorization.

72503522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 72503522 is about 8514.8999994128. The cubic root of 72503522 is about 416.9842978213.

The spelling of 72503522 in words is "seventy-two million, five hundred three thousand, five hundred twenty-two".