1213351504 has 10 divisors (see below), whose sum is σ = 2350868570. Its totient is φ = 606675744.

The previous prime is 1213351429. The next prime is 1213351541. The reversal of 1213351504 is 4051533121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1198544400 + 14807104 = 34620^2 + 3848^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37917219 + ... + 37917250.

It is an arithmetic number, because the mean of its divisors is an integer number (235086857).

Almost surely, 2^1213351504 is an apocalyptic number.

It is an amenable number.

1213351504 is a deficient number, since it is larger than the sum of its proper divisors (1137517066).

1213351504 is an equidigital number, since it uses as much as digits as its factorization.

1213351504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75834477 (or 75834471 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1213351504 is about 34833.1954319439. The cubic root of 1213351504 is about 1066.5851783234.

Adding to 1213351504 its reverse (4051533121), we get a palindrome (5264884625).

The spelling of 1213351504 in words is "one billion, two hundred thirteen million, three hundred fifty-one thousand, five hundred four".