73445131 has 4 divisors (see below), whose sum is σ = 73548000. Its totient is φ = 73342264.

The previous prime is 73445101. The next prime is 73445167. The reversal of 73445131 is 13154437.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73445131 - 2⁹ = 73444619 is a prime.

It is a super-2 number, since 2×73445131² = 10788374535214322, which contains 22 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 73445131.

It is not an unprimeable number, because it can be changed into a prime (73445101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50356 + ... + 51793.

It is an arithmetic number, because the mean of its divisors is an integer number (18387000).

Almost surely, 2^73445131 is an apocalyptic number.

73445131 is a deficient number, since it is larger than the sum of its proper divisors (102869).

73445131 is a wasteful number, since it uses less digits than its factorization.

73445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102868.

The product of its digits is 5040, while the sum is 28.

The square root of 73445131 is about 8570.0134772356. The cubic root of 73445131 is about 418.7816753050.

Adding to 73445131 its reverse (13154437), we get a palindrome (86599568).

The spelling of 73445131 in words is "seventy-three million, four hundred forty-five thousand, one hundred thirty-one".