1213552400 has 30 divisors (see below), whose sum is σ = 2915560602. Its totient is φ = 485420800.

The previous prime is 1213552391. The next prime is 1213552411. The reversal of 1213552400 is 42553121.

It can be written as a sum of positive squares in 3 ways, for example, as 171295744 + 1042256656 = 13088^2 + 32284^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1516541 + ... + 1517340.

Almost surely, 2^1213552400 is an apocalyptic number.

1213552400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213552400 is an abundant number, since it is smaller than the sum of its proper divisors (1702008202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213552400 is a wasteful number, since it uses less digits than its factorization.

1213552400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033899 (or 3033888 counting only the distinct ones).

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

The square root of 1213552400 is about 34836.0789986474. The cubic root of 1213552400 is about 1066.6440403187.

The spelling of 1213552400 in words is "one billion, two hundred thirteen million, five hundred fifty-two thousand, four hundred".