1153203220 has 24 divisors (see below), whose sum is σ = 2608014024. Its totient is φ = 425798016.

The previous prime is 1153203217. The next prime is 1153203223. The reversal of 1153203220 is 223023511.

It is an interprime number because it is at equal distance from previous prime (1153203217) and next prime (1153203223).

It can be written as a sum of positive squares in 4 ways, for example, as 2365444 + 1150837776 = 1538^2 + 33924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153203223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217439 + ... + 2217958.

It is an arithmetic number, because the mean of its divisors is an integer number (108667251).

Almost surely, 2^1153203220 is an apocalyptic number.

1153203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153203220 is an abundant number, since it is smaller than the sum of its proper divisors (1454810804).

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

1153203220 is a wasteful number, since it uses less digits than its factorization.

1153203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435419 (or 4435417 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1153203220 is about 33958.8459756806. The cubic root of 1153203220 is about 1048.6613992638.

Adding to 1153203220 its reverse (223023511), we get a palindrome (1376226731).

The spelling of 1153203220 in words is "one billion, one hundred fifty-three million, two hundred three thousand, two hundred twenty".