251230115430 has 256 divisors, whose sum is σ = 784482693120. Its totient is φ = 56028672000.

The previous prime is 251230115413. The next prime is 251230115443. The reversal of 251230115430 is 34511032152.

251230115430 is a `hidden beast` number, since 2 + 512 + 3 + 0 + 115 + 4 + 30 = 666.

It is a super-2 number, since 2×251230115430² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 251230115394 and 251230115403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13006780 + ... + 13026080.

It is an arithmetic number, because the mean of its divisors is an integer number (3064385520).

Almost surely, 2^251230115430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251230115430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392241346560).

251230115430 is an abundant number, since it is smaller than the sum of its proper divisors (533252577690).

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

251230115430 is a wasteful number, since it uses less digits than its factorization.

251230115430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19492 (or 19486 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 251230115430 its reverse (34511032152), we get a palindrome (285741147582).

The spelling of 251230115430 in words is "two hundred fifty-one billion, two hundred thirty million, one hundred fifteen thousand, four hundred thirty".