217811625147007 has 2 divisors, whose sum is σ = 217811625147008. Its totient is φ = 217811625147006.

The previous prime is 217811625146989. The next prime is 217811625147019. The reversal of 217811625147007 is 700741526118712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217811625147007 - 2²³ = 217811616758399 is a prime.

It is a super-2 number, since 2×217811625147007² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217811625147047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108905812573503 + 108905812573504.

It is an arithmetic number, because the mean of its divisors is an integer number (108905812573504).

Almost surely, 2^{217811625147007} is an apocalyptic number.

217811625147007 is a deficient number, since it is larger than the sum of its proper divisors (1).

217811625147007 is an equidigital number, since it uses as much as digits as its factorization.

217811625147007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 217811625147007 in words is "two hundred seventeen trillion, eight hundred eleven billion, six hundred twenty-five million, one hundred forty-seven thousand, seven".