217457148756 has 48 divisors (see below), whose sum is σ = 508995468800. Its totient is φ = 72257990112.

The previous prime is 217457148749. The next prime is 217457148757. The reversal of 217457148756 is 657841754712.

It is a super-2 number, since 2×217457148756² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217457148696 and 217457148705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217457148757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9899121 + ... + 9921063.

Almost surely, 2^217457148756 is an apocalyptic number.

It is an amenable number.

217457148756 is an abundant number, since it is smaller than the sum of its proper divisors (291538320044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217457148756 is a wasteful number, since it uses less digits than its factorization.

217457148756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24508 (or 24506 counting only the distinct ones).

The product of its digits is 13171200, while the sum is 57.

The spelling of 217457148756 in words is "two hundred seventeen billion, four hundred fifty-seven million, one hundred forty-eight thousand, seven hundred fifty-six".