1722672225 has 24 divisors (see below), whose sum is σ = 3164613920. Its totient is φ = 918758160.

The previous prime is 1722672209. The next prime is 1722672227. The reversal of 1722672225 is 5222762271.

1722672225 is a `hidden beast` number, since 172 + 267 + 2 + 225 = 666.

It is not a de Polignac number, because 1722672225 - 2⁴ = 1722672209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1722672225.

It is not an unprimeable number, because it can be changed into a prime (1722672227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1275379 + ... + 1276728.

Almost surely, 2^1722672225 is an apocalyptic number.

1722672225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1722672225 is a deficient number, since it is larger than the sum of its proper divisors (1441941695).

1722672225 is a wasteful number, since it uses less digits than its factorization.

1722672225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552126 (or 2552115 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 1722672225 is about 41505.0867364471. The cubic root of 1722672225 is about 1198.7654490889.

The spelling of 1722672225 in words is "one billion, seven hundred twenty-two million, six hundred seventy-two thousand, two hundred twenty-five".