155131434 has 12 divisors (see below), whose sum is σ = 336118146. Its totient is φ = 51710472.

The previous prime is 155131429. The next prime is 155131507. The reversal of 155131434 is 434131551.

It is a happy number.

155131434 is a `hidden beast` number, since 1 + 5 + 513 + 143 + 4 = 666.

155131434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 152399025 + 2732409 = 12345^2 + 1653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155131398 and 155131407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4309189 + ... + 4309224.

Almost surely, 2^155131434 is an apocalyptic number.

155131434 is an abundant number, since it is smaller than the sum of its proper divisors (180986712).

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

155131434 is a wasteful number, since it uses less digits than its factorization.

155131434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618421 (or 8618418 counting only the distinct ones).

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

The square root of 155131434 is about 12455.1769959323. The cubic root of 155131434 is about 537.3203253068.

Adding to 155131434 its reverse (434131551), we get a palindrome (589262985).

The spelling of 155131434 in words is "one hundred fifty-five million, one hundred thirty-one thousand, four hundred thirty-four".