71522250 has 64 divisors (see below), whose sum is σ = 182407680. Its totient is φ = 18657600.

The previous prime is 71522197. The next prime is 71522257. The reversal of 71522250 is 5222517.

It is a self number, because there is not a number n which added to its sum of digits gives 71522250.

It is not an unprimeable number, because it can be changed into a prime (71522257) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34236 + ... + 36264.

It is an arithmetic number, because the mean of its divisors is an integer number (2850120).

Almost surely, 2^71522250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71522250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91203840).

71522250 is an abundant number, since it is smaller than the sum of its proper divisors (110885430).

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

71522250 is a wasteful number, since it uses less digits than its factorization.

71522250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 71522250 is about 8457.0828303854. The cubic root of 71522250 is about 415.0945736946.

Adding to 71522250 its reverse (5222517), we get a palindrome (76744767).

The spelling of 71522250 in words is "seventy-one million, five hundred twenty-two thousand, two hundred fifty".