1231315050 has 48 divisors (see below), whose sum is σ = 3489901632. Its totient is φ = 281443200.

The previous prime is 1231314983. The next prime is 1231315081. The reversal of 1231315050 is 505131321.

It is a super-2 number, since 2×1231315050² = 3032273504713005000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 585291 + ... + 587390.

It is an arithmetic number, because the mean of its divisors is an integer number (72706284).

Almost surely, 2^1231315050 is an apocalyptic number.

1231315050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231315050 is an abundant number, since it is smaller than the sum of its proper divisors (2258586582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231315050 is a wasteful number, since it uses less digits than its factorization.

1231315050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172703 (or 1172698 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1231315050 is about 35090.0990309232. The cubic root of 1231315050 is about 1071.8229761942.

Adding to 1231315050 its reverse (505131321), we get a palindrome (1736446371).

The spelling of 1231315050 in words is "one billion, two hundred thirty-one million, three hundred fifteen thousand, fifty".