142155233 has 4 divisors (see below), whose sum is σ = 155078448. Its totient is φ = 129232020.

The previous prime is 142155227. The next prime is 142155239. The reversal of 142155233 is 332551241.

It is a happy number.

142155233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (142155227) and next prime (142155239).

It is a cyclic number.

It is not a de Polignac number, because 142155233 - 2⁴ = 142155217 is a prime.

It is a super-2 number, since 2×142155233² = 40416220538568578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142155239) 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, 6461591 + ... + 6461612.

It is an arithmetic number, because the mean of its divisors is an integer number (38769612).

Almost surely, 2^142155233 is an apocalyptic number.

It is an amenable number.

142155233 is a deficient number, since it is larger than the sum of its proper divisors (12923215).

142155233 is a wasteful number, since it uses less digits than its factorization.

142155233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12923214.

The product of its digits is 3600, while the sum is 26.

The square root of 142155233 is about 11922.8869406700. The cubic root of 142155233 is about 521.9003849294.

The spelling of 142155233 in words is "one hundred forty-two million, one hundred fifty-five thousand, two hundred thirty-three".