155229539 has 2 divisors, whose sum is σ = 155229540. Its totient is φ = 155229538.

The previous prime is 155229523. The next prime is 155229551. The reversal of 155229539 is 935922551.

It is a strong prime.

It is an emirp because it is prime and its reverse (935922551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155229539 - 2⁴ = 155229523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155229496 and 155229505.

It is not a weakly prime, because it can be changed into another prime (155229509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77614769 + 77614770.

It is an arithmetic number, because the mean of its divisors is an integer number (77614770).

Almost surely, 2^155229539 is an apocalyptic number.

155229539 is a deficient number, since it is larger than the sum of its proper divisors (1).

155229539 is an equidigital number, since it uses as much as digits as its factorization.

155229539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121500, while the sum is 41.

The square root of 155229539 is about 12459.1146956756. The cubic root of 155229539 is about 537.4335684258.

The spelling of 155229539 in words is "one hundred fifty-five million, two hundred twenty-nine thousand, five hundred thirty-nine".