251230000000 has 512 divisors, whose sum is σ = 741888725760. Its totient is φ = 82944000000.

The previous prime is 251229999973. The next prime is 251230000009. The reversal of 251230000000 is 32152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251230000009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2589999952 + ... + 2590000048.

Almost surely, 2^251230000000 is an apocalyptic number.

251230000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251230000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370944362880).

251230000000 is an abundant number, since it is smaller than the sum of its proper divisors (490658725760).

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

251230000000 is an frugal number, since it uses more digits than its factorization.

251230000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

Adding to 251230000000 its reverse (32152), we get a palindrome (251230032152).

The spelling of 251230000000 in words is "two hundred fifty-one billion, two hundred thirty million", and thus it is an aban number.