155223539 has 4 divisors (see below), whose sum is σ = 155292024. Its totient is φ = 155155056.

The previous prime is 155223533. The next prime is 155223587. The reversal of 155223539 is 935322551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155223539 - 2²⁴ = 138446323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155223499 and 155223508.

It is not an unprimeable number, because it can be changed into a prime (155223533) 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, 30722 + ... + 35415.

It is an arithmetic number, because the mean of its divisors is an integer number (38823006).

Almost surely, 2^155223539 is an apocalyptic number.

155223539 is a deficient number, since it is larger than the sum of its proper divisors (68485).

155223539 is an equidigital number, since it uses as much as digits as its factorization.

155223539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68484.

The product of its digits is 40500, while the sum is 35.

The square root of 155223539 is about 12458.8739057750. The cubic root of 155223539 is about 537.4266439642.

The spelling of 155223539 in words is "one hundred fifty-five million, two hundred twenty-three thousand, five hundred thirty-nine".