1251533520230 has 32 divisors (see below), whose sum is σ = 2579108074560. Its totient is φ = 428343068160.

The previous prime is 1251533520151. The next prime is 1251533520239. The reversal of 1251533520230 is 320253351521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251533520239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15671111 + ... + 15750770.

It is an arithmetic number, because the mean of its divisors is an integer number (80597127330).

Almost surely, 2^{1251533520230} is an apocalyptic number.

1251533520230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251533520230 is an abundant number, since it is smaller than the sum of its proper divisors (1327574554330).

1251533520230 is a wasteful number, since it uses less digits than its factorization.

1251533520230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31422464.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 1251533520230 its reverse (320253351521), we get a palindrome (1571786871751).

The spelling of 1251533520230 in words is "one trillion, two hundred fifty-one billion, five hundred thirty-three million, five hundred twenty thousand, two hundred thirty".