1231053330 has 64 divisors (see below), whose sum is σ = 3190215168. Its totient is φ = 302227200.

The previous prime is 1231053319. The next prime is 1231053337. The reversal of 1231053330 is 333501321.

It is a junction number, because it is equal to n+sod(n) for n = 1231053297 and 1231053306.

It is not an unprimeable number, because it can be changed into a prime (1231053337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150855 + ... + 158805.

It is an arithmetic number, because the mean of its divisors is an integer number (49847112).

Almost surely, 2^1231053330 is an apocalyptic number.

1231053330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231053330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595107584).

1231053330 is an abundant number, since it is smaller than the sum of its proper divisors (1959161838).

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

1231053330 is a wasteful number, since it uses less digits than its factorization.

1231053330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 1231053330 is about 35086.3695756629. The cubic root of 1231053330 is about 1071.7470309987.

Adding to 1231053330 its reverse (333501321), we get a palindrome (1564554651).

The spelling of 1231053330 in words is "one billion, two hundred thirty-one million, fifty-three thousand, three hundred thirty".