155142023 has 4 divisors (see below), whose sum is σ = 157011288. Its totient is φ = 153272760.

The previous prime is 155141981. The next prime is 155142047. The reversal of 155142023 is 320241551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320241551 = 7 ⋅45748793.

It is a cyclic number.

It is not a de Polignac number, because 155142023 - 2¹⁶ = 155076487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155142023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155142223) 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, 934508 + ... + 934673.

It is an arithmetic number, because the mean of its divisors is an integer number (39252822).

Almost surely, 2^155142023 is an apocalyptic number.

155142023 is a deficient number, since it is larger than the sum of its proper divisors (1869265).

155142023 is an equidigital number, since it uses as much as digits as its factorization.

155142023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869264.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155142023 is about 12455.6020729630. The cubic root of 155142023 is about 537.3325505434.

Adding to 155142023 its reverse (320241551), we get a palindrome (475383574).

The spelling of 155142023 in words is "one hundred fifty-five million, one hundred forty-two thousand, twenty-three".