72201529 has 4 divisors (see below), whose sum is σ = 73563876. Its totient is φ = 70839184.

The previous prime is 72201523. The next prime is 72201559. The reversal of 72201529 is 92510227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92510227 = 41 ⋅2256347.

It can be written as a sum of positive squares in 2 ways, for example, as 41951529 + 30250000 = 6477^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 72201529 - 2⁷ = 72201401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72201497 and 72201506.

It is not an unprimeable number, because it can be changed into a prime (72201523) 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, 681094 + ... + 681199.

It is an arithmetic number, because the mean of its divisors is an integer number (18390969).

Almost surely, 2^72201529 is an apocalyptic number.

It is an amenable number.

72201529 is a deficient number, since it is larger than the sum of its proper divisors (1362347).

72201529 is a wasteful number, since it uses less digits than its factorization.

72201529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362346.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 72201529 is about 8497.1482863370. The cubic root of 72201529 is about 416.4045485982.

Subtracting from 72201529 its product of nonzero digits (2520), we obtain a square (72199009 = 8497²).

It can be divided in two parts, 72 and 201529, that added together give a square (201601 = 449²).

The spelling of 72201529 in words is "seventy-two million, two hundred one thousand, five hundred twenty-nine".