73131775 has 12 divisors (see below), whose sum is σ = 91962864. Its totient is φ = 57680000.

The previous prime is 73131763. The next prime is 73131787. The reversal of 73131775 is 57713137.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73131763) and next prime (73131787).

It is a de Polignac number, because none of the positive numbers 2^k-73131775 is a prime.

It is a super-3 number, since 3×73131775³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73131775.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18826 + ... + 22375.

It is an arithmetic number, because the mean of its divisors is an integer number (7663572).

Almost surely, 2^73131775 is an apocalyptic number.

73131775 is a deficient number, since it is larger than the sum of its proper divisors (18831089).

73131775 is a wasteful number, since it uses less digits than its factorization.

73131775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41282 (or 41277 counting only the distinct ones).

The product of its digits is 15435, while the sum is 34.

The square root of 73131775 is about 8551.7118169405. The cubic root of 73131775 is about 418.1852444655.

The spelling of 73131775 in words is "seventy-three million, one hundred thirty-one thousand, seven hundred seventy-five".