12203231540 has 24 divisors (see below), whose sum is σ = 25631975880. Its totient is φ = 4880304128.

The previous prime is 12203231519. The next prime is 12203231563. The reversal of 12203231540 is 4513230221.

It can be written as a sum of positive squares in 4 ways, for example, as 4193339536 + 8009892004 = 64756^2 + 89498^2 .

It is a congruent number.

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, 43856 + ... + 162264.

It is an arithmetic number, because the mean of its divisors is an integer number (1067998995).

Almost surely, 2^12203231540 is an apocalyptic number.

12203231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12203231540 is an abundant number, since it is smaller than the sum of its proper divisors (13428744340).

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

12203231540 is a wasteful number, since it uses less digits than its factorization.

12203231540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123571 (or 123569 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 12203231540 its reverse (4513230221), we get a palindrome (16716461761).

The spelling of 12203231540 in words is "twelve billion, two hundred three million, two hundred thirty-one thousand, five hundred forty".