1203023155 has 4 divisors (see below), whose sum is σ = 1443627792. Its totient is φ = 962418520.

The previous prime is 1203023111. The next prime is 1203023161. The reversal of 1203023155 is 5513203021.

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

It is not a de Polignac number, because 1203023155 - 2¹⁵ = 1202990387 is a prime.

It is a super-2 number, since 2×1203023155² = 2894529422932308050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120302311 + ... + 120302320.

It is an arithmetic number, because the mean of its divisors is an integer number (360906948).

Almost surely, 2^1203023155 is an apocalyptic number.

1203023155 is a deficient number, since it is larger than the sum of its proper divisors (240604637).

1203023155 is an equidigital number, since it uses as much as digits as its factorization.

1203023155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240604636.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1203023155 is about 34684.6241870948. The cubic root of 1203023155 is about 1063.5502046053.

Adding to 1203023155 its reverse (5513203021), we get a palindrome (6716226176).

The spelling of 1203023155 in words is "one billion, two hundred three million, twenty-three thousand, one hundred fifty-five".