155218853 has 2 divisors, whose sum is σ = 155218854. Its totient is φ = 155218852.

The previous prime is 155218841. The next prime is 155218859. The reversal of 155218853 is 358812551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135443044 + 19775809 = 11638^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 155218853 - 2¹⁸ = 154956709 is a prime.

It is a super-3 number, since 3×155218853³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155218859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77609426 + 77609427.

It is an arithmetic number, because the mean of its divisors is an integer number (77609427).

Almost surely, 2^155218853 is an apocalyptic number.

It is an amenable number.

155218853 is a deficient number, since it is larger than the sum of its proper divisors (1).

155218853 is an equidigital number, since it uses as much as digits as its factorization.

155218853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 38.

The square root of 155218853 is about 12458.6858456259. The cubic root of 155218853 is about 537.4212358356.

The spelling of 155218853 in words is "one hundred fifty-five million, two hundred eighteen thousand, eight hundred fifty-three".