155649227 has 2 divisors, whose sum is σ = 155649228. Its totient is φ = 155649226.

The previous prime is 155649217. The next prime is 155649313. The reversal of 155649227 is 722946551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155649227 - 2⁸ = 155648971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155649217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77824613 + 77824614.

It is an arithmetic number, because the mean of its divisors is an integer number (77824614).

Almost surely, 2^155649227 is an apocalyptic number.

155649227 is a deficient number, since it is larger than the sum of its proper divisors (1).

155649227 is an equidigital number, since it uses as much as digits as its factorization.

155649227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 155649227 is about 12475.9459360804. The cubic root of 155649227 is about 537.9174785791.

The spelling of 155649227 in words is "one hundred fifty-five million, six hundred forty-nine thousand, two hundred twenty-seven".