1213954550 has 24 divisors (see below), whose sum is σ = 2261696016. Its totient is φ = 484777440.

The previous prime is 1213954549. The next prime is 1213954579. The reversal of 1213954550 is 554593121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213954550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10847 + ... + 50453.

It is an arithmetic number, because the mean of its divisors is an integer number (94237334).

Almost surely, 2^1213954550 is an apocalyptic number.

1213954550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213954550 is a deficient number, since it is larger than the sum of its proper divisors (1047741466).

1213954550 is a wasteful number, since it uses less digits than its factorization.

1213954550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40232 (or 40227 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1213954550 is about 34841.8505536087. The cubic root of 1213954550 is about 1066.7618496876.

The spelling of 1213954550 in words is "one billion, two hundred thirteen million, nine hundred fifty-four thousand, five hundred fifty".