155240023 has 4 divisors (see below), whose sum is σ = 155267848. Its totient is φ = 155212200.

The previous prime is 155240017. The next prime is 155240053. The reversal of 155240023 is 320042551.

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 155240023 - 2⁵ = 155239991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155239976 and 155240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155240053) 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, 2328 + ... + 17773.

It is an arithmetic number, because the mean of its divisors is an integer number (38816962).

Almost surely, 2^155240023 is an apocalyptic number.

155240023 is a deficient number, since it is larger than the sum of its proper divisors (27825).

155240023 is an equidigital number, since it uses as much as digits as its factorization.

155240023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27824.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 155240023 is about 12459.5354247259. The cubic root of 155240023 is about 537.4456673402.

Adding to 155240023 its reverse (320042551), we get a palindrome (475282574).

The spelling of 155240023 in words is "one hundred fifty-five million, two hundred forty thousand, twenty-three".