1213130550 has 48 divisors (see below), whose sum is σ = 3081958992. Its totient is φ = 315609600.

The previous prime is 1213130539. The next prime is 1213130587. The reversal of 1213130550 is 550313121.

1213130550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 92479 + ... + 104778.

It is an arithmetic number, because the mean of its divisors is an integer number (64207479).

Almost surely, 2^1213130550 is an apocalyptic number.

1213130550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213130550 is an abundant number, since it is smaller than the sum of its proper divisors (1868828442).

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

1213130550 is a wasteful number, since it uses less digits than its factorization.

1213130550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197313 (or 197308 counting only the distinct ones).

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

The square root of 1213130550 is about 34830.0236864691. The cubic root of 1213130550 is about 1066.5204318843.

Adding to 1213130550 its reverse (550313121), we get a palindrome (1763443671).

The spelling of 1213130550 in words is "one billion, two hundred thirteen million, one hundred thirty thousand, five hundred fifty".