155438203 has 2 divisors, whose sum is σ = 155438204. Its totient is φ = 155438202.

The previous prime is 155438201. The next prime is 155438237. The reversal of 155438203 is 302834551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155438203 - 2¹ = 155438201 is a prime.

It is a super-2 number, since 2×155438203² = 48322069903738418, which contains 22 as substring.

Together with 155438201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155438201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77719101 + 77719102.

It is an arithmetic number, because the mean of its divisors is an integer number (77719102).

Almost surely, 2^155438203 is an apocalyptic number.

155438203 is a deficient number, since it is larger than the sum of its proper divisors (1).

155438203 is an equidigital number, since it uses as much as digits as its factorization.

155438203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 155438203 is about 12467.4858331582. The cubic root of 155438203 is about 537.6742718119.

The spelling of 155438203 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, two hundred three".