71550232 has 32 divisors (see below), whose sum is σ = 149143680. Its totient is φ = 31956480.

The previous prime is 71550211. The next prime is 71550239. The reversal of 71550232 is 23205517.

It is a junction number, because it is equal to n+sod(n) for n = 71550197 and 71550206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71550239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7873 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (4660740).

Almost surely, 2^71550232 is an apocalyptic number.

It is an amenable number.

71550232 is an abundant number, since it is smaller than the sum of its proper divisors (77593448).

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

71550232 is a wasteful number, since it uses less digits than its factorization.

71550232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22243 (or 22239 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 71550232 is about 8458.7370215653. The cubic root of 71550232 is about 415.1486997972.

Adding to 71550232 its reverse (23205517), we get a palindrome (94755749).

The spelling of 71550232 in words is "seventy-one million, five hundred fifty thousand, two hundred thirty-two".