1231533260 has 24 divisors (see below), whose sum is σ = 2722337520. Its totient is φ = 466686144.

The previous prime is 1231533253. The next prime is 1231533293. The reversal of 1231533260 is 623351321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620059 + ... + 1620818.

It is an arithmetic number, because the mean of its divisors is an integer number (113430730).

Almost surely, 2^1231533260 is an apocalyptic number.

1231533260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231533260 is an abundant number, since it is smaller than the sum of its proper divisors (1490804260).

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

1231533260 is a wasteful number, since it uses less digits than its factorization.

1231533260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240905 (or 3240903 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1231533260 is about 35093.2081748021. The cubic root of 1231533260 is about 1071.8862875504.

Adding to 1231533260 its reverse (623351321), we get a palindrome (1854884581).

The spelling of 1231533260 in words is "one billion, two hundred thirty-one million, five hundred thirty-three thousand, two hundred sixty".