73072131 has 16 divisors (see below), whose sum is σ = 106437888. Its totient is φ = 44223200.

The previous prime is 73072123. The next prime is 73072159. The reversal of 73072131 is 13127037.

It is a cyclic number.

It is not a de Polignac number, because 73072131 - 2³ = 73072123 is a prime.

It is a super-2 number, since 2×73072131² = 10679072657762322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73072231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33970 + ... + 36056.

It is an arithmetic number, because the mean of its divisors is an integer number (6652368).

Almost surely, 2^73072131 is an apocalyptic number.

73072131 is a deficient number, since it is larger than the sum of its proper divisors (33365757).

73072131 is a wasteful number, since it uses less digits than its factorization.

73072131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 73072131 is about 8548.2238506019. The cubic root of 73072131 is about 418.0715272544.

Adding to 73072131 its reverse (13127037), we get a palindrome (86199168).

The spelling of 73072131 in words is "seventy-three million, seventy-two thousand, one hundred thirty-one".