155144331 has 12 divisors (see below), whose sum is σ = 225337840. Its totient is φ = 102857040.

The previous prime is 155144323. The next prime is 155144351. The reversal of 155144331 is 133441551.

It is a happy number.

155144331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155144331 - 2³ = 155144323 is a prime.

It is a super-2 number, since 2×155144331² = 48139526882875122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155144295 and 155144304.

It is not an unprimeable number, because it can be changed into a prime (155144351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45991 + ... + 49248.

Almost surely, 2^155144331 is an apocalyptic number.

155144331 is a deficient number, since it is larger than the sum of its proper divisors (70193509).

155144331 is a wasteful number, since it uses less digits than its factorization.

155144331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95426 (or 95423 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 155144331 is about 12455.6947216926. The cubic root of 155144331 is about 537.3352151070.

Adding to 155144331 its reverse (133441551), we get a palindrome (288585882).

The spelling of 155144331 in words is "one hundred fifty-five million, one hundred forty-four thousand, three hundred thirty-one".