1251430215250 has 64 divisors (see below), whose sum is σ = 2415583078272. Its totient is φ = 485101800000.

The previous prime is 1251430215197. The next prime is 1251430215263. The reversal of 1251430215250 is 525120341521.

It is a super-2 number, since 2×1251430215250² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2052249 + ... + 2591251.

It is an arithmetic number, because the mean of its divisors is an integer number (37743485598).

Almost surely, 2^{1251430215250} is an apocalyptic number.

1251430215250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251430215250 is a deficient number, since it is larger than the sum of its proper divisors (1164152863022).

1251430215250 is a wasteful number, since it uses less digits than its factorization.

1251430215250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539308 (or 539298 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1251430215250 its reverse (525120341521), we get a palindrome (1776550556771).

The spelling of 1251430215250 in words is "one trillion, two hundred fifty-one billion, four hundred thirty million, two hundred fifteen thousand, two hundred fifty".