155213369 has 2 divisors, whose sum is σ = 155213370. Its totient is φ = 155213368.

The previous prime is 155213347. The next prime is 155213371. The reversal of 155213369 is 963312551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154057744 + 1155625 = 12412^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 155213369 - 2¹² = 155209273 is a prime.

It is a super-2 number, since 2×155213369² = 48182379832660322, which contains 22 as substring.

Together with 155213371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155213329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77606684 + 77606685.

It is an arithmetic number, because the mean of its divisors is an integer number (77606685).

Almost surely, 2^155213369 is an apocalyptic number.

It is an amenable number.

155213369 is a deficient number, since it is larger than the sum of its proper divisors (1).

155213369 is an equidigital number, since it uses as much as digits as its factorization.

155213369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 35.

The square root of 155213369 is about 12458.4657562639. The cubic root of 155213369 is about 537.4149065942.

The spelling of 155213369 in words is "one hundred fifty-five million, two hundred thirteen thousand, three hundred sixty-nine".