155238623 has 2 divisors, whose sum is σ = 155238624. Its totient is φ = 155238622.

The previous prime is 155238599. The next prime is 155238649. The reversal of 155238623 is 326832551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155238623 - 2¹⁶ = 155173087 is a prime.

It is a super-2 number, since 2×155238623² = 48198060141872258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152238623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77619311 + 77619312.

It is an arithmetic number, because the mean of its divisors is an integer number (77619312).

Almost surely, 2^155238623 is an apocalyptic number.

155238623 is a deficient number, since it is larger than the sum of its proper divisors (1).

155238623 is an equidigital number, since it uses as much as digits as its factorization.

155238623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 155238623 is about 12459.4792427292. The cubic root of 155238623 is about 537.4440517212. Note that the first 3 decimals are identical.

The spelling of 155238623 in words is "one hundred fifty-five million, two hundred thirty-eight thousand, six hundred twenty-three".