73220131 has 2 divisors, whose sum is σ = 73220132. Its totient is φ = 73220130.

The previous prime is 73220117. The next prime is 73220141. The reversal of 73220131 is 13102237.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73220131 - 2¹⁷ = 73089059 is a prime.

It is a super-2 number, since 2×73220131² = 10722375167314322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73220099 and 73220108.

It is not a weakly prime, because it can be changed into another prime (73220141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36610065 + 36610066.

It is an arithmetic number, because the mean of its divisors is an integer number (36610066).

Almost surely, 2^73220131 is an apocalyptic number.

73220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

73220131 is an equidigital number, since it uses as much as digits as its factorization.

73220131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 73220131 is about 8556.8762407785. The cubic root of 73220131 is about 418.3535903730.

Adding to 73220131 its reverse (13102237), we get a palindrome (86322368).

The spelling of 73220131 in words is "seventy-three million, two hundred twenty thousand, one hundred thirty-one".