155223671 has 4 divisors (see below), whose sum is σ = 155842344. Its totient is φ = 154605000.

The previous prime is 155223659. The next prime is 155223701. The reversal of 155223671 is 176322551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176322551 = 521 ⋅338431.

It is a cyclic number.

It is not a de Polignac number, because 155223671 - 2²² = 151029367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155225671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308960 + ... + 309461.

It is an arithmetic number, because the mean of its divisors is an integer number (38960586).

Almost surely, 2^155223671 is an apocalyptic number.

155223671 is a deficient number, since it is larger than the sum of its proper divisors (618673).

155223671 is an equidigital number, since it uses as much as digits as its factorization.

155223671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618672.

The product of its digits is 12600, while the sum is 32.

The square root of 155223671 is about 12458.8792032028. The cubic root of 155223671 is about 537.4267963043.

The spelling of 155223671 in words is "one hundred fifty-five million, two hundred twenty-three thousand, six hundred seventy-one".