1213224045 has 48 divisors (see below), whose sum is σ = 2139431616. Its totient is φ = 586643200.

The previous prime is 1213224041. The next prime is 1213224049. The reversal of 1213224045 is 5404223121.

It is an interprime number because it is at equal distance from previous prime (1213224041) and next prime (1213224049).

It is not a de Polignac number, because 1213224045 - 2² = 1213224041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213224041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 944974 + ... + 946256.

It is an arithmetic number, because the mean of its divisors is an integer number (44571492).

Almost surely, 2^1213224045 is an apocalyptic number.

1213224045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213224045 is a deficient number, since it is larger than the sum of its proper divisors (926207571).

1213224045 is a wasteful number, since it uses less digits than its factorization.

1213224045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1213224045 is about 34831.3658216269. The cubic root of 1213224045 is about 1066.5478298056.

Adding to 1213224045 its reverse (5404223121), we get a palindrome (6617447166).

The spelling of 1213224045 in words is "one billion, two hundred thirteen million, two hundred twenty-four thousand, forty-five".