75131712 has 84 divisors (see below), whose sum is σ = 223373696. Its totient is φ = 25038720.

The previous prime is 75131671. The next prime is 75131737. The reversal of 75131712 is 21713157.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13137 + ... + 17967.

Almost surely, 2^75131712 is an apocalyptic number.

75131712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75131712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111686848).

75131712 is an abundant number, since it is smaller than the sum of its proper divisors (148241984).

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

75131712 is an equidigital number, since it uses as much as digits as its factorization.

75131712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4858 (or 4836 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 75131712 is about 8667.8550980044. The cubic root of 75131712 is about 421.9630553972.

Adding to 75131712 its reverse (21713157), we get a palindrome (96844869).

The spelling of 75131712 in words is "seventy-five million, one hundred thirty-one thousand, seven hundred twelve".