75542220 has 240 divisors, whose sum is σ = 271500768. Its totient is φ = 17418240.

The previous prime is 75542209. The next prime is 75542227. The reversal of 75542220 is 2224557.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (75542227) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 357915 + ... + 358125.

Almost surely, 2^75542220 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 75542220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135750384).

75542220 is an abundant number, since it is smaller than the sum of its proper divisors (195958548).

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

75542220 is a wasteful number, since it uses less digits than its factorization.

75542220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 75542220 is about 8691.5027469362. The cubic root of 75542220 is about 422.7301734736.

Adding to 75542220 its reverse (2224557), we get a palindrome (77766777).

The spelling of 75542220 in words is "seventy-five million, five hundred forty-two thousand, two hundred twenty".