251230115400 has 96 divisors (see below), whose sum is σ = 849614594400. Its totient is φ = 60904268800.

The previous prime is 251230115387. The next prime is 251230115413. The reversal of 251230115400 is 4511032152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (251230115387) and next prime (251230115413).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19025985 + ... + 19039184.

It is an arithmetic number, because the mean of its divisors is an integer number (8850152025).

Almost surely, 2^251230115400 is an apocalyptic number.

251230115400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251230115400 is an abundant number, since it is smaller than the sum of its proper divisors (598384479000).

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

251230115400 is a wasteful number, since it uses less digits than its factorization.

251230115400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38065199 (or 38065190 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 251230115400 its reverse (4511032152), we get a palindrome (255741147552).

The spelling of 251230115400 in words is "two hundred fifty-one billion, two hundred thirty million, one hundred fifteen thousand, four hundred".