73131505 has 16 divisors (see below), whose sum is σ = 89596800. Its totient is φ = 57290112.

The previous prime is 73131493. The next prime is 73131517. The reversal of 73131505 is 50513137.

It is an interprime number because it is at equal distance from previous prime (73131493) and next prime (73131517).

It is a cyclic number.

It is not a de Polignac number, because 73131505 - 2¹⁹ = 72607217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73131505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66117 + ... + 67213.

It is an arithmetic number, because the mean of its divisors is an integer number (5599800).

Almost surely, 2^73131505 is an apocalyptic number.

It is an amenable number.

73131505 is a deficient number, since it is larger than the sum of its proper divisors (16465295).

73131505 is a wasteful number, since it uses less digits than its factorization.

73131505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 73131505 is about 8551.6960306129. The cubic root of 73131505 is about 418.1847298231.

The spelling of 73131505 in words is "seventy-three million, one hundred thirty-one thousand, five hundred five".