225715213507646 has 4 divisors (see below), whose sum is σ = 338572820261472. Its totient is φ = 112857606753822.

The previous prime is 225715213507621. The next prime is 225715213507673. The reversal of 225715213507646 is 646705312517522.

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

It is a super-2 number, since 2×225715213507646² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225715213507591 and 225715213507600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56428803376910 + ... + 56428803376913.

It is an arithmetic number, because the mean of its divisors is an integer number (84643205065368).

Almost surely, 2^{225715213507646} is an apocalyptic number.

225715213507646 is a deficient number, since it is larger than the sum of its proper divisors (112857606753826).

225715213507646 is a wasteful number, since it uses less digits than its factorization.

225715213507646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112857606753825.

The product of its (nonzero) digits is 21168000, while the sum is 56.

The spelling of 225715213507646 in words is "two hundred twenty-five trillion, seven hundred fifteen billion, two hundred thirteen million, five hundred seven thousand, six hundred forty-six".