251120650000 has 240 divisors, whose sum is σ = 671544893376. Its totient is φ = 90200000000.

The previous prime is 251120649979. The next prime is 251120650003. The reversal of 251120650000 is 56021152.

It is a super-4 number, since 4×251120650000⁴ (a number of 47 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (251120650003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45647250 + ... + 45652750.

Almost surely, 2^251120650000 is an apocalyptic number.

251120650000 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 251120650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335772446688).

251120650000 is an abundant number, since it is smaller than the sum of its proper divisors (420424243376).

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

251120650000 is an equidigital number, since it uses as much as digits as its factorization.

251120650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 5602 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 251120650000 its reverse (56021152), we get a palindrome (251176671152).

The spelling of 251120650000 in words is "two hundred fifty-one billion, one hundred twenty million, six hundred fifty thousand".