155223429 has 4 divisors (see below), whose sum is σ = 206964576. Its totient is φ = 103482284.

The previous prime is 155223391. The next prime is 155223451. The reversal of 155223429 is 924322551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155223429 - 2⁷ = 155223301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155223429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155323429) 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, 25870569 + ... + 25870574.

It is an arithmetic number, because the mean of its divisors is an integer number (51741144).

Almost surely, 2^155223429 is an apocalyptic number.

It is an amenable number.

155223429 is a deficient number, since it is larger than the sum of its proper divisors (51741147).

155223429 is an equidigital number, since it uses as much as digits as its factorization.

155223429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51741146.

The product of its digits is 21600, while the sum is 33.

The square root of 155223429 is about 12458.8694912500. The cubic root of 155223429 is about 537.4265170141.

The spelling of 155223429 in words is "one hundred fifty-five million, two hundred twenty-three thousand, four hundred twenty-nine".