1213496550 has 432 divisors, whose sum is σ = 4180780032. Its totient is φ = 246758400.

The previous prime is 1213496527. The next prime is 1213496573. The reversal of 1213496550 is 556943121.

1213496550 is a `hidden beast` number, since 1 + 2 + 13 + 4 + 96 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (1213496527) and next prime (1213496573).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 28220829 + ... + 28220871.

Almost surely, 2^1213496550 is an apocalyptic number.

1213496550 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 1213496550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090390016).

1213496550 is an abundant number, since it is smaller than the sum of its proper divisors (2967283482).

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

1213496550 is a wasteful number, since it uses less digits than its factorization.

1213496550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1213496550 is about 34835.2773779684. The cubic root of 1213496550 is about 1066.6276770688.

The spelling of 1213496550 in words is "one billion, two hundred thirteen million, four hundred ninety-six thousand, five hundred fifty".