72211552 has 96 divisors (see below), whose sum is σ = 175150080. Its totient is φ = 28695168.

The previous prime is 72211547. The next prime is 72211567. The reversal of 72211552 is 25511227.

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, 1536393 + ... + 1536439.

It is an arithmetic number, because the mean of its divisors is an integer number (1824480).

Almost surely, 2^72211552 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 72211552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87575040).

72211552 is an abundant number, since it is smaller than the sum of its proper divisors (102938528).

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

72211552 is an equidigital number, since it uses as much as digits as its factorization.

72211552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 75 counting only the distinct ones).

The product of its digits is 1400, while the sum is 25.

The square root of 72211552 is about 8497.7380519759. The cubic root of 72211552 is about 416.4238161019.

Adding to 72211552 its reverse (25511227), we get a palindrome (97722779).

It can be divided in two parts, 722 and 11552, that multiplied together give a square (8340544 = 2888²).

The spelling of 72211552 in words is "seventy-two million, two hundred eleven thousand, five hundred fifty-two".