251083423040 has 112 divisors (see below), whose sum is σ = 641979903744. Its totient is φ = 93194035200.

The previous prime is 251083423033. The next prime is 251083423103. The reversal of 251083423040 is 40324380152.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 251083422988 and 251083423006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61205 + ... + 711275.

Almost surely, 2^251083423040 is an apocalyptic number.

251083423040 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 251083423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320989951872).

251083423040 is an abundant number, since it is smaller than the sum of its proper divisors (390896480704).

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

251083423040 is a wasteful number, since it uses less digits than its factorization.

251083423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650176 (or 650166 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 251083423040 in words is "two hundred fifty-one billion, eighty-three million, four hundred twenty-three thousand, forty".