76221552 has 80 divisors (see below), whose sum is σ = 216057600. Its totient is φ = 22963200.

The previous prime is 76221539. The next prime is 76221589. The reversal of 76221552 is 25512267.

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, 126949 + ... + 127547.

It is an arithmetic number, because the mean of its divisors is an integer number (2700720).

Almost surely, 2^76221552 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 76221552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108028800).

76221552 is an abundant number, since it is smaller than the sum of its proper divisors (139836048).

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

76221552 is a wasteful number, since it uses less digits than its factorization.

76221552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 856 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 76221552 is about 8730.4955185831. The cubic root of 76221552 is about 423.9935622613.

It can be divided in two parts, 762215 and 52, that added together give a palindrome (762267).

The spelling of 76221552 in words is "seventy-six million, two hundred twenty-one thousand, five hundred fifty-two".