1225523013 has 64 divisors (see below), whose sum is σ = 2045336832. Its totient is φ = 641249280.

The previous prime is 1225522973. The next prime is 1225523021. The reversal of 1225523013 is 3103255221.

It is a happy number.

It is not a de Polignac number, because 1225523013 - 2¹⁶ = 1225457477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225523113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1436295 + ... + 1437147.

It is an arithmetic number, because the mean of its divisors is an integer number (31958388).

Almost surely, 2^1225523013 is an apocalyptic number.

1225523013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1225523013 is a deficient number, since it is larger than the sum of its proper divisors (819813819).

1225523013 is a wasteful number, since it uses less digits than its factorization.

1225523013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1225523013 is about 35007.4708169556. The cubic root of 1225523013 is about 1070.1397357320.

Adding to 1225523013 its reverse (3103255221), we get a palindrome (4328778234).

The spelling of 1225523013 in words is "one billion, two hundred twenty-five million, five hundred twenty-three thousand, thirteen".