72534552 has 64 divisors (see below), whose sum is σ = 193584000. Its totient is φ = 22581504.

The previous prime is 72534547. The next prime is 72534577. The reversal of 72534552 is 25543527.

It is a super-2 number, since 2×72534552² = 10522522467681408, which contains 22 as substring.

It is a congruent number.

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, 32199 + ... + 34377.

It is an arithmetic number, because the mean of its divisors is an integer number (3024750).

Almost surely, 2^72534552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72534552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96792000).

72534552 is an abundant number, since it is smaller than the sum of its proper divisors (121049448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72534552 is a wasteful number, since it uses less digits than its factorization.

72534552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280 (or 2276 counting only the distinct ones).

The product of its digits is 42000, while the sum is 33.

The square root of 72534552 is about 8516.7219045828. The cubic root of 72534552 is about 417.0437762070.

Subtracting from 72534552 its reverse (25543527), we obtain a square (46991025 = 6855²).

The spelling of 72534552 in words is "seventy-two million, five hundred thirty-four thousand, five hundred fifty-two".