1213055504 has 20 divisors (see below), whose sum is σ = 2351072364. Its totient is φ = 606327168.

The previous prime is 1213055483. The next prime is 1213055509. The reversal of 1213055504 is 4055503121.

It can be written as a sum of positive squares in 2 ways, for example, as 677040400 + 536015104 = 26020^2 + 23152^2 .

It is not an unprimeable number, because it can be changed into a prime (1213055509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45494 + ... + 67050.

Almost surely, 2^1213055504 is an apocalyptic number.

It is an amenable number.

1213055504 is a deficient number, since it is larger than the sum of its proper divisors (1138016860).

1213055504 is a wasteful number, since it uses less digits than its factorization.

1213055504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25082 (or 25076 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1213055504 is about 34828.9463521365. The cubic root of 1213055504 is about 1066.4984392683.

Adding to 1213055504 its reverse (4055503121), we get a palindrome (5268558625).

It can be divided in two parts, 121 and 3055504, that multiplied together give a square (369715984 = 19228²).

The spelling of 1213055504 in words is "one billion, two hundred thirteen million, fifty-five thousand, five hundred four".