155455933 has 2 divisors, whose sum is σ = 155455934. Its totient is φ = 155455932.

The previous prime is 155455889. The next prime is 155455957. The reversal of 155455933 is 339554551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89813529 + 65642404 = 9477^2 + 8102^2 .

It is a cyclic number.

It is not a de Polignac number, because 155455933 - 2¹⁷ = 155324861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155455733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77727966 + 77727967.

It is an arithmetic number, because the mean of its divisors is an integer number (77727967).

Almost surely, 2^155455933 is an apocalyptic number.

It is an amenable number.

155455933 is a deficient number, since it is larger than the sum of its proper divisors (1).

155455933 is an equidigital number, since it uses as much as digits as its factorization.

155455933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 40.

The square root of 155455933 is about 12468.1968624176. The cubic root of 155455933 is about 537.6947142391.

The spelling of 155455933 in words is "one hundred fifty-five million, four hundred fifty-five thousand, nine hundred thirty-three".