217027152551 has 12 divisors (see below), whose sum is σ = 240371520312. Its totient is φ = 195791310000.

The previous prime is 217027152539. The next prime is 217027152583. The reversal of 217027152551 is 155251720712.

It is a happy number.

It is not a de Polignac number, because 217027152551 - 2⁶ = 217027152487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217027152521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6830000 + ... + 6861701.

It is an arithmetic number, because the mean of its divisors is an integer number (20030960026).

Almost surely, 2^217027152551 is an apocalyptic number.

217027152551 is a deficient number, since it is larger than the sum of its proper divisors (23344367761).

217027152551 is a wasteful number, since it uses less digits than its factorization.

217027152551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13691854 (or 13691843 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 38.

The spelling of 217027152551 in words is "two hundred seventeen billion, twenty-seven million, one hundred fifty-two thousand, five hundred fifty-one".