1225302551 has 4 divisors (see below), whose sum is σ = 1336693704. Its totient is φ = 1113911400.

The previous prime is 1225302493. The next prime is 1225302569. The reversal of 1225302551 is 1552035221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225302551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225302551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225302581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55695560 + ... + 55695581.

It is an arithmetic number, because the mean of its divisors is an integer number (334173426).

Almost surely, 2^1225302551 is an apocalyptic number.

1225302551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225302551 is a deficient number, since it is larger than the sum of its proper divisors (111391153).

1225302551 is a wasteful number, since it uses less digits than its factorization.

1225302551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111391152.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1225302551 is about 35004.3218903038. The cubic root of 1225302551 is about 1070.0755619622.

Adding to 1225302551 its reverse (1552035221), we get a palindrome (2777337772).

The spelling of 1225302551 in words is "one billion, two hundred twenty-five million, three hundred two thousand, five hundred fifty-one".