72353522 has 4 divisors (see below), whose sum is σ = 108530286. Its totient is φ = 36176760.

The previous prime is 72353509. The next prime is 72353549. The reversal of 72353522 is 22535327.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 48038761 + 24314761 = 6931^2 + 4931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18088379 + ... + 18088382.

Almost surely, 2^72353522 is an apocalyptic number.

72353522 is a deficient number, since it is larger than the sum of its proper divisors (36176764).

72353522 is a wasteful number, since it uses less digits than its factorization.

72353522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36176763.

The product of its digits is 12600, while the sum is 29.

The square root of 72353522 is about 8506.0873496573. The cubic root of 72353522 is about 416.6965378762.

Adding to 72353522 its reverse (22535327), we get a palindrome (94888849).

It can be divided in two parts, 723 and 53522, that added together give a palindrome (54245).

The spelling of 72353522 in words is "seventy-two million, three hundred fifty-three thousand, five hundred twenty-two".