251141020 has 24 divisors (see below), whose sum is σ = 567965664. Its totient is φ = 92728896.

The previous prime is 251140999. The next prime is 251141029. The reversal of 251141020 is 20141152.

It is a junction number, because it is equal to n+sod(n) for n = 251140985 and 251141003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251141029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482704 + ... + 483223.

It is an arithmetic number, because the mean of its divisors is an integer number (23665236).

Almost surely, 2^251141020 is an apocalyptic number.

251141020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251141020 is an abundant number, since it is smaller than the sum of its proper divisors (316824644).

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

251141020 is a wasteful number, since it uses less digits than its factorization.

251141020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965949 (or 965947 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 251141020 is about 15847.4294445503. The cubic root of 251141020 is about 630.9174673111.

Adding to 251141020 its reverse (20141152), we get a palindrome (271282172).

The spelling of 251141020 in words is "two hundred fifty-one million, one hundred forty-one thousand, twenty".