155111142 has 16 divisors (see below), whose sum is σ = 313069680. Its totient is φ = 51229152.

The previous prime is 155111137. The next prime is 155111153. The reversal of 155111142 is 241111551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117933 + ... + 119240.

It is an arithmetic number, because the mean of its divisors is an integer number (19566855).

Almost surely, 2^155111142 is an apocalyptic number.

155111142 is an abundant number, since it is smaller than the sum of its proper divisors (157958538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155111142 is a wasteful number, since it uses less digits than its factorization.

155111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237287.

The product of its digits is 200, while the sum is 21.

The square root of 155111142 is about 12454.3623682628. The cubic root of 155111142 is about 537.2968961856.

Adding to 155111142 its reverse (241111551), we get a palindrome (396222693).

It can be divided in two parts, 15511 and 1142, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 155111142 in words is "one hundred fifty-five million, one hundred eleven thousand, one hundred forty-two".