1216250430 has 32 divisors (see below), whose sum is σ = 3019658400. Its totient is φ = 313149312.

The previous prime is 1216250429. The next prime is 1216250473. The reversal of 1216250430 is 340526121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216250430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698125 + ... + 699864.

It is an arithmetic number, because the mean of its divisors is an integer number (94364325).

Almost surely, 2^1216250430 is an apocalyptic number.

1216250430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216250430 is an abundant number, since it is smaller than the sum of its proper divisors (1803407970).

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

1216250430 is a wasteful number, since it uses less digits than its factorization.

1216250430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398028.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1216250430 is about 34874.7821498572. The cubic root of 1216250430 is about 1067.4339272471.

Adding to 1216250430 its reverse (340526121), we get a palindrome (1556776551).

The spelling of 1216250430 in words is "one billion, two hundred sixteen million, two hundred fifty thousand, four hundred thirty".