155761229 has 8 divisors (see below), whose sum is σ = 168614712. Its totient is φ = 143032320.

The previous prime is 155761217. The next prime is 155761237. The reversal of 155761229 is 922167551.

155761229 = 202² + 203² + ... + 780².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8988004 + 146773225 = 2998^2 + 12115^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155761229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155761192 and 155761201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155761279) 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, 28532 + ... + 33549.

It is an arithmetic number, because the mean of its divisors is an integer number (21076839).

Almost surely, 2^155761229 is an apocalyptic number.

It is an amenable number.

155761229 is a deficient number, since it is larger than the sum of its proper divisors (12853483).

155761229 is a wasteful number, since it uses less digits than its factorization.

155761229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62287.

The product of its digits is 37800, while the sum is 38.

The square root of 155761229 is about 12480.4338466257. The cubic root of 155761229 is about 538.0464724485.

The spelling of 155761229 in words is "one hundred fifty-five million, seven hundred sixty-one thousand, two hundred twenty-nine".