1213352451 has 12 divisors (see below), whose sum is σ = 1752923328. Its totient is φ = 808761744.

The previous prime is 1213352449. The next prime is 1213352453. The reversal of 1213352451 is 1542533121.

1213352451 is a `hidden beast` number, since 1 + 2 + 133 + 524 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1213352449) and next prime (1213352453).

It is not a de Polignac number, because 1213352451 - 2¹ = 1213352449 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1213352453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89166 + ... + 101868.

It is an arithmetic number, because the mean of its divisors is an integer number (146076944).

Almost surely, 2^1213352451 is an apocalyptic number.

1213352451 is a deficient number, since it is larger than the sum of its proper divisors (539570877).

1213352451 is a wasteful number, since it uses less digits than its factorization.

1213352451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322 (or 23319 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1213352451 is about 34833.2090252965. The cubic root of 1213352451 is about 1066.5854558072.

Adding to 1213352451 its reverse (1542533121), we get a palindrome (2755885572).

The spelling of 1213352451 in words is "one billion, two hundred thirteen million, three hundred fifty-two thousand, four hundred fifty-one".