155419971 has 16 divisors (see below), whose sum is σ = 242608128. Its totient is φ = 86644800.

The previous prime is 155419969. The next prime is 155419987. The reversal of 155419971 is 179914551.

It is a happy number.

It is not a de Polignac number, because 155419971 - 2¹ = 155419969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155419951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89395 + ... + 91116.

It is an arithmetic number, because the mean of its divisors is an integer number (15163008).

Almost surely, 2^155419971 is an apocalyptic number.

155419971 is a deficient number, since it is larger than the sum of its proper divisors (87188157).

155419971 is a wasteful number, since it uses less digits than its factorization.

155419971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180562.

The product of its digits is 56700, while the sum is 42.

The square root of 155419971 is about 12466.7546298144. The cubic root of 155419971 is about 537.6532489651.

The spelling of 155419971 in words is "one hundred fifty-five million, four hundred nineteen thousand, nine hundred seventy-one".