155131133 has 2 divisors, whose sum is σ = 155131134. Its totient is φ = 155131132.

The previous prime is 155131129. The next prime is 155131147. The reversal of 155131133 is 331131551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131492089 + 23639044 = 11467^2 + 4862^2 .

It is an emirp because it is prime and its reverse (331131551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155131133 - 2² = 155131129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155131099 and 155131108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155131153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77565566 + 77565567.

It is an arithmetic number, because the mean of its divisors is an integer number (77565567).

Almost surely, 2^155131133 is an apocalyptic number.

It is an amenable number.

155131133 is a deficient number, since it is larger than the sum of its proper divisors (1).

155131133 is an equidigital number, since it uses as much as digits as its factorization.

155131133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 675, while the sum is 23.

The square root of 155131133 is about 12455.1649125975. The cubic root of 155131133 is about 537.3199777874.

Adding to 155131133 its reverse (331131551), we get a palindrome (486262684).

The spelling of 155131133 in words is "one hundred fifty-five million, one hundred thirty-one thousand, one hundred thirty-three".