155420131 has 8 divisors (see below), whose sum is σ = 164837664. Its totient is φ = 146224320.

The previous prime is 155420129. The next prime is 155420141. The reversal of 155420131 is 131024551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155420131 - 2¹ = 155420129 is a prime.

It is a super-2 number, since 2×155420131² = 48310834240114322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155420141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53986 + ... + 56791.

It is an arithmetic number, because the mean of its divisors is an integer number (20604708).

Almost surely, 2^155420131 is an apocalyptic number.

155420131 is a deficient number, since it is larger than the sum of its proper divisors (9417533).

155420131 is a wasteful number, since it uses less digits than its factorization.

155420131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110861.

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

The square root of 155420131 is about 12466.7610468798. The cubic root of 155420131 is about 537.6534334641.

Adding to 155420131 its reverse (131024551), we get a palindrome (286444682).

It can be divided in two parts, 155420 and 131, that added together give a palindrome (155551).

The spelling of 155420131 in words is "one hundred fifty-five million, four hundred twenty thousand, one hundred thirty-one".