71153220 has 48 divisors (see below), whose sum is σ = 204619968. Its totient is φ = 18460800.

The previous prime is 71153219. The next prime is 71153221. The reversal of 71153220 is 2235117.

It is an interprime number because it is at equal distance from previous prime (71153219) and next prime (71153221).

It is not an unprimeable number, because it can be changed into a prime (71153221) 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 15 ways as a sum of consecutive naturals, for example, 13806 + ... + 18245.

It is an arithmetic number, because the mean of its divisors is an integer number (4262916).

Almost surely, 2^71153220 is an apocalyptic number.

It is an amenable number.

71153220 is an abundant number, since it is smaller than the sum of its proper divisors (133466748).

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

71153220 is a wasteful number, since it uses less digits than its factorization.

71153220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32100 (or 32098 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 71153220 is about 8435.2368075828. The cubic root of 71153220 is about 414.3794276421.

Adding to 71153220 its reverse (2235117), we get a palindrome (73388337).

The spelling of 71153220 in words is "seventy-one million, one hundred fifty-three thousand, two hundred twenty".