217125601215506 has 32 divisors (see below), whose sum is σ = 334925044655040. Its totient is φ = 105533097018624.

The previous prime is 217125601215463. The next prime is 217125601215547. The reversal of 217125601215506 is 605512106521712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16303955 + ... + 26458838.

It is an arithmetic number, because the mean of its divisors is an integer number (10466407645470).

Almost surely, 2^{217125601215506} is an apocalyptic number.

217125601215506 is a deficient number, since it is larger than the sum of its proper divisors (117799443439534).

217125601215506 is a wasteful number, since it uses less digits than its factorization.

217125601215506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42763370.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 217125601215506 in words is "two hundred seventeen trillion, one hundred twenty-five billion, six hundred one million, two hundred fifteen thousand, five hundred six".