7206161231 has 4 divisors (see below), whose sum is σ = 7277509464. Its totient is φ = 7134813000.

The previous prime is 7206161227. The next prime is 7206161267. The reversal of 7206161231 is 1321616027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321616027 = 173 ⋅7639399.

It is a cyclic number.

It is not a de Polignac number, because 7206161231 - 2² = 7206161227 is a prime.

It is a super-2 number, since 2×7206161231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7206161194 and 7206161203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7206161731) 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, 35673965 + ... + 35674166.

It is an arithmetic number, because the mean of its divisors is an integer number (1819377366).

Almost surely, 2^7206161231 is an apocalyptic number.

7206161231 is a deficient number, since it is larger than the sum of its proper divisors (71348233).

7206161231 is a wasteful number, since it uses less digits than its factorization.

7206161231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71348232.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 7206161231 is about 84889.1113806712. Note that the first 3 decimals coincide. The cubic root of 7206161231 is about 1931.5294087613.

Adding to 7206161231 its reverse (1321616027), we get a palindrome (8527777258).

The spelling of 7206161231 in words is "seven billion, two hundred six million, one hundred sixty-one thousand, two hundred thirty-one".