75221132 has 24 divisors (see below), whose sum is σ = 156984576. Its totient is φ = 30835728.

The previous prime is 75221119. The next prime is 75221143. The reversal of 75221132 is 23112257.

It is a happy number.

It is a super-2 number, since 2×75221132² = 11316437398722848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 75221098 and 75221107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57758 + ... + 59045.

It is an arithmetic number, because the mean of its divisors is an integer number (6541024).

Almost surely, 2^75221132 is an apocalyptic number.

It is an amenable number.

75221132 is an abundant number, since it is smaller than the sum of its proper divisors (81763444).

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

75221132 is a wasteful number, since it uses less digits than its factorization.

75221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116837 (or 116835 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 75221132 is about 8673.0117029784. The cubic root of 75221132 is about 422.1303925357.

Adding to 75221132 its reverse (23112257), we get a palindrome (98333389).

The spelling of 75221132 in words is "seventy-five million, two hundred twenty-one thousand, one hundred thirty-two".