155042131 has 4 divisors (see below), whose sum is σ = 155077200. Its totient is φ = 155007064.

The previous prime is 155042113. The next prime is 155042231. The reversal of 155042131 is 131240551.

It is a happy number.

155042131 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 an emirpimes, since its reverse is a distinct semiprime: 131240551 = 13 ⋅10095427.

It is a cyclic number.

It is not a de Polignac number, because 155042131 - 2¹⁷ = 154911059 is a prime.

It is a super-2 number, since 2×155042131² = 48076124770042322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155042231) 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, 9751 + ... + 20128.

It is an arithmetic number, because the mean of its divisors is an integer number (38769300).

Almost surely, 2^155042131 is an apocalyptic number.

155042131 is a deficient number, since it is larger than the sum of its proper divisors (35069).

155042131 is an equidigital number, since it uses as much as digits as its factorization.

155042131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35068.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 155042131 is about 12451.5915047033. The cubic root of 155042131 is about 537.2172008652.

Adding to 155042131 its reverse (131240551), we get a palindrome (286282682).

It can be divided in two parts, 1550 and 42131, that added together give a square (43681 = 209²).

The spelling of 155042131 in words is "one hundred fifty-five million, forty-two thousand, one hundred thirty-one".