72225381251 has 4 divisors (see below), whose sum is σ = 72226879872. Its totient is φ = 72223882632.

The previous prime is 72225381227. The next prime is 72225381299. The reversal of 72225381251 is 15218352227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15218352227 = 13 ⋅1170642479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72225381251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72225381211) 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, 674531 + ... + 774236.

It is an arithmetic number, because the mean of its divisors is an integer number (18056719968).

Almost surely, 2^72225381251 is an apocalyptic number.

72225381251 is a deficient number, since it is larger than the sum of its proper divisors (1498621).

72225381251 is a wasteful number, since it uses less digits than its factorization.

72225381251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498620.

The product of its digits is 67200, while the sum is 38.

The spelling of 72225381251 in words is "seventy-two billion, two hundred twenty-five million, three hundred eighty-one thousand, two hundred fifty-one".