102151778227 has 16 divisors (see below), whose sum is σ = 111119821920. Its totient is φ = 93514203648.

The previous prime is 102151778191. The next prime is 102151778237. The reversal of 102151778227 is 722877151201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102151778227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102151778237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2055549 + ... + 2104657.

It is an arithmetic number, because the mean of its divisors is an integer number (6944988870).

Almost surely, 2^102151778227 is an apocalyptic number.

102151778227 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

102151778227 is a deficient number, since it is larger than the sum of its proper divisors (8968043693).

102151778227 is a wasteful number, since it uses less digits than its factorization.

102151778227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52470.

The product of its (nonzero) digits is 109760, while the sum is 43.

The spelling of 102151778227 in words is "one hundred two billion, one hundred fifty-one million, seven hundred seventy-eight thousand, two hundred twenty-seven".