155355523 has 4 divisors (see below), whose sum is σ = 160712640. Its totient is φ = 149998408.

The previous prime is 155355521. The next prime is 155355553. The reversal of 155355523 is 325553551.

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 155355523 - 2¹ = 155355521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155355521) 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, 2678515 + ... + 2678572.

It is an arithmetic number, because the mean of its divisors is an integer number (40178160).

Almost surely, 2^155355523 is an apocalyptic number.

155355523 is a deficient number, since it is larger than the sum of its proper divisors (5357117).

155355523 is an equidigital number, since it uses as much as digits as its factorization.

155355523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357116.

The product of its digits is 56250, while the sum is 34.

The square root of 155355523 is about 12464.1695672034. The cubic root of 155355523 is about 537.5789224655.

The spelling of 155355523 in words is "one hundred fifty-five million, three hundred fifty-five thousand, five hundred twenty-three".