155231303 has 4 divisors (see below), whose sum is σ = 155358840. Its totient is φ = 155103768.

The previous prime is 155231281. The next prime is 155231309. The reversal of 155231303 is 303132551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155231303 - 2¹⁴ = 155214919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155231309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61925 + ... + 64382.

It is an arithmetic number, because the mean of its divisors is an integer number (38839710).

Almost surely, 2^155231303 is an apocalyptic number.

155231303 is a deficient number, since it is larger than the sum of its proper divisors (127537).

155231303 is a wasteful number, since it uses less digits than its factorization.

155231303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127536.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 155231303 is about 12459.1854870212. The cubic root of 155231303 is about 537.4356041836.

Adding to 155231303 its reverse (303132551), we get a palindrome (458363854).

The spelling of 155231303 in words is "one hundred fifty-five million, two hundred thirty-one thousand, three hundred three".