155243369 has 2 divisors, whose sum is σ = 155243370. Its totient is φ = 155243368.

The previous prime is 155243321. The next prime is 155243383. The reversal of 155243369 is 963342551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96138025 + 59105344 = 9805^2 + 7688^2 .

It is a cyclic number.

It is not a de Polignac number, because 155243369 - 2⁸ = 155243113 is a prime.

It is a super-2 number, since 2×155243369² = 48201007236940322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155243069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77621684 + 77621685.

It is an arithmetic number, because the mean of its divisors is an integer number (77621685).

Almost surely, 2^155243369 is an apocalyptic number.

It is an amenable number.

155243369 is a deficient number, since it is larger than the sum of its proper divisors (1).

155243369 is an equidigital number, since it uses as much as digits as its factorization.

155243369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 155243369 is about 12459.6696986718. The cubic root of 155243369 is about 537.4495286303.

The spelling of 155243369 in words is "one hundred fifty-five million, two hundred forty-three thousand, three hundred sixty-nine".