1213220552 has 32 divisors (see below), whose sum is σ = 2288626680. Its totient is φ = 602933760.

The previous prime is 1213220549. The next prime is 1213220563. The reversal of 1213220552 is 2550223121.

It can be written as a sum of positive squares in 4 ways, for example, as 1127213476 + 86007076 = 33574^2 + 9274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654778 + ... + 1655510.

Almost surely, 2^1213220552 is an apocalyptic number.

It is an amenable number.

1213220552 is a deficient number, since it is larger than the sum of its proper divisors (1075406128).

1213220552 is a wasteful number, since it uses less digits than its factorization.

1213220552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1213220552 is about 34831.3156800027. The cubic root of 1213220552 is about 1066.5468062368.

Adding to 1213220552 its reverse (2550223121), we get a palindrome (3763443673).

The spelling of 1213220552 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, five hundred fifty-two".