155451671 has 2 divisors, whose sum is σ = 155451672. Its totient is φ = 155451670.

The previous prime is 155451601. The next prime is 155451677. The reversal of 155451671 is 176154551.

It is a strong prime.

It is an emirp because it is prime and its reverse (176154551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155451671 - 2²² = 151257367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155451677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77725835 + 77725836.

It is an arithmetic number, because the mean of its divisors is an integer number (77725836).

Almost surely, 2^155451671 is an apocalyptic number.

155451671 is a deficient number, since it is larger than the sum of its proper divisors (1).

155451671 is an equidigital number, since it uses as much as digits as its factorization.

155451671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 35.

The square root of 155451671 is about 12468.0259463958. The cubic root of 155451671 is about 537.6898003582.

The spelling of 155451671 in words is "one hundred fifty-five million, four hundred fifty-one thousand, six hundred seventy-one".