1157631203 has 4 divisors (see below), whose sum is σ = 1159173408. Its totient is φ = 1156089000.

The previous prime is 1157631157. The next prime is 1157631227. The reversal of 1157631203 is 3021367511.

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 1157631203 - 2¹⁶ = 1157565667 is a prime.

It is a super-2 number, since 2×1157631203² = 2680220004318454418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157631253) 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, 769976 + ... + 771477.

It is an arithmetic number, because the mean of its divisors is an integer number (289793352).

Almost surely, 2^1157631203 is an apocalyptic number.

1157631203 is a deficient number, since it is larger than the sum of its proper divisors (1542205).

1157631203 is an equidigital number, since it uses as much as digits as its factorization.

1157631203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542204.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1157631203 is about 34023.9798230601. The cubic root of 1157631203 is about 1050.0018754313.

Adding to 1157631203 its reverse (3021367511), we get a palindrome (4178998714).

The spelling of 1157631203 in words is "one billion, one hundred fifty-seven million, six hundred thirty-one thousand, two hundred three".