251023233340 has 48 divisors (see below), whose sum is σ = 575144650080. Its totient is φ = 91269550080.

The previous prime is 251023233319. The next prime is 251023233361. The reversal of 251023233340 is 43332320152.

It is an interprime number because it is at equal distance from previous prime (251023233319) and next prime (251023233361).

It is a junction number, because it is equal to n+sod(n) for n = 251023233299 and 251023233308.

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, 1763884 + ... + 1900876.

It is an arithmetic number, because the mean of its divisors is an integer number (11982180210).

Almost surely, 2^251023233340 is an apocalyptic number.

251023233340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251023233340 is an abundant number, since it is smaller than the sum of its proper divisors (324121416740).

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

251023233340 is a wasteful number, since it uses less digits than its factorization.

251023233340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145342 (or 145340 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 251023233340 its reverse (43332320152), we get a palindrome (294355553492).

The spelling of 251023233340 in words is "two hundred fifty-one billion, twenty-three million, two hundred thirty-three thousand, three hundred forty".