217048231725 has 48 divisors (see below), whose sum is σ = 396902013312. Its totient is φ = 103966536960.

The previous prime is 217048231721. The next prime is 217048231759. The reversal of 217048231725 is 527132840712.

It is a happy number.

It is not a de Polignac number, because 217048231725 - 2² = 217048231721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217048231721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2972217 + ... + 3044366.

It is an arithmetic number, because the mean of its divisors is an integer number (8268791944).

Almost surely, 2^217048231725 is an apocalyptic number.

217048231725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

217048231725 is a deficient number, since it is larger than the sum of its proper divisors (179853781587).

217048231725 is a wasteful number, since it uses less digits than its factorization.

217048231725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016646 (or 6016641 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 217048231725 in words is "two hundred seventeen billion, forty-eight million, two hundred thirty-one thousand, seven hundred twenty-five".