225697651 has 2 divisors, whose sum is σ = 225697652. Its totient is φ = 225697650.

The previous prime is 225697603. The next prime is 225697709. The reversal of 225697651 is 156796522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225697651 - 2¹⁹ = 225173363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225697598 and 225697607.

It is not a weakly prime, because it can be changed into another prime (225698651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112848825 + 112848826.

It is an arithmetic number, because the mean of its divisors is an integer number (112848826).

Almost surely, 2^225697651 is an apocalyptic number.

225697651 is a deficient number, since it is larger than the sum of its proper divisors (1).

225697651 is an equidigital number, since it uses as much as digits as its factorization.

225697651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 43.

The square root of 225697651 is about 15023.2370346740. The cubic root of 225697651 is about 608.8481812163.

The spelling of 225697651 in words is "two hundred twenty-five million, six hundred ninety-seven thousand, six hundred fifty-one".