203113545 has 16 divisors (see below), whose sum is σ = 327860352. Its totient is φ = 107367680.

The previous prime is 203113541. The next prime is 203113579. The reversal of 203113545 is 545311302.

It is not a de Polignac number, because 203113545 - 2² = 203113541 is a prime.

It is a super-2 number, since 2×203113545² = 82510224324934050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203113541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58221 + ... + 61610.

It is an arithmetic number, because the mean of its divisors is an integer number (20491272).

Almost surely, 2^203113545 is an apocalyptic number.

It is an amenable number.

203113545 is a deficient number, since it is larger than the sum of its proper divisors (124746807).

203113545 is a wasteful number, since it uses less digits than its factorization.

203113545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119952.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 203113545 is about 14251.7909400889. The cubic root of 203113545 is about 587.8226216552.

Adding to 203113545 its reverse (545311302), we get a palindrome (748424847).

It can be divided in two parts, 2031 and 13545, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 203113545 in words is "two hundred three million, one hundred thirteen thousand, five hundred forty-five".