72011552 has 24 divisors (see below), whose sum is σ = 141997212. Its totient is φ = 35948800.

The previous prime is 72011549. The next prime is 72011579. The reversal of 72011552 is 25511027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68492176 + 3519376 = 8276^2 + 1876^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24902 + ... + 27642.

Almost surely, 2^72011552 is an apocalyptic number.

It is an amenable number.

72011552 is a deficient number, since it is larger than the sum of its proper divisors (69985660).

72011552 is a wasteful number, since it uses less digits than its factorization.

72011552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572 (or 3564 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 72011552 is about 8485.9620550648. The cubic root of 72011552 is about 416.0390126135.

Adding to 72011552 its reverse (25511027), we get a palindrome (97522579).

The spelling of 72011552 in words is "seventy-two million, eleven thousand, five hundred fifty-two".