73131138 has 12 divisors (see below), whose sum is σ = 158450838. Its totient is φ = 24377040.

The previous prime is 73131073. The next prime is 73131151. The reversal of 73131138 is 83113137.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 6985449 = 8133^2 + 2643^2 .

It is a super-3 number, since 3×73131138³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2031403 + ... + 2031438.

Almost surely, 2^73131138 is an apocalyptic number.

73131138 is an abundant number, since it is smaller than the sum of its proper divisors (85319700).

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

73131138 is a wasteful number, since it uses less digits than its factorization.

73131138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062849 (or 4062846 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 73131138 is about 8551.6745728541. The cubic root of 73131138 is about 418.1840302885.

The spelling of 73131138 in words is "seventy-three million, one hundred thirty-one thousand, one hundred thirty-eight".