72201157231 has 4 divisors (see below), whose sum is σ = 82515608272. Its totient is φ = 61886706192.

The previous prime is 72201157213. The next prime is 72201157247. The reversal of 72201157231 is 13275110227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72201157231 - 2¹¹ = 72201155183 is a prime.

It is a super-2 number, since 2×72201157231² (a number of 23 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 = 72201157193 and 72201157202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72201157211) 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, 5157225510 + ... + 5157225523.

It is an arithmetic number, because the mean of its divisors is an integer number (20628902068).

Almost surely, 2^72201157231 is an apocalyptic number.

72201157231 is a deficient number, since it is larger than the sum of its proper divisors (10314451041).

72201157231 is a wasteful number, since it uses less digits than its factorization.

72201157231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314451040.

The product of its (nonzero) digits is 5880, while the sum is 31.

Adding to 72201157231 its reverse (13275110227), we get a palindrome (85476267458).

The spelling of 72201157231 in words is "seventy-two billion, two hundred one million, one hundred fifty-seven thousand, two hundred thirty-one".