203157291 has 16 divisors (see below), whose sum is σ = 294333440. Its totient is φ = 124169760.

The previous prime is 203157287. The next prime is 203157299. The reversal of 203157291 is 192751302.

It is not a de Polignac number, because 203157291 - 2² = 203157287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203157299) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 55720 + ... + 59253.

It is an arithmetic number, because the mean of its divisors is an integer number (18395840).

Almost surely, 2^203157291 is an apocalyptic number.

203157291 is a deficient number, since it is larger than the sum of its proper divisors (91176149).

203157291 is a wasteful number, since it uses less digits than its factorization.

203157291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115026.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 203157291 is about 14253.3256119405. The cubic root of 203157291 is about 587.8648197970.

The spelling of 203157291 in words is "two hundred three million, one hundred fifty-seven thousand, two hundred ninety-one".