71523432 has 32 divisors (see below), whose sum is σ = 198676800. Its totient is φ = 23841072.

The previous prime is 71523349. The next prime is 71523433. The reversal of 71523432 is 23432517.

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

It is a junction number, because it is equal to n+sod(n) for n = 71523396 and 71523405.

It is not an unprimeable number, because it can be changed into a prime (71523433) 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 7 ways as a sum of consecutive naturals, for example, 165348 + ... + 165779.

It is an arithmetic number, because the mean of its divisors is an integer number (6208650).

Almost surely, 2^71523432 is an apocalyptic number.

71523432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71523432 is an abundant number, since it is smaller than the sum of its proper divisors (127153368).

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

71523432 is a wasteful number, since it uses less digits than its factorization.

71523432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331142 (or 331132 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 71523432 is about 8457.1527123495. The cubic root of 71523432 is about 415.0968603447.

Adding to 71523432 its reverse (23432517), we get a palindrome (94955949).

The spelling of 71523432 in words is "seventy-one million, five hundred twenty-three thousand, four hundred thirty-two".