25713220 has 24 divisors (see below), whose sum is σ = 58152024. Its totient is φ = 9494016.

The previous prime is 25713217. The next prime is 25713221. The reversal of 25713220 is 2231752.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 25381444 = 576^2 + 5038^2 .

It is a super-2 number, since 2×25713220² = 1322339365536800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25713191 and 25713200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25713221) 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, 49189 + ... + 49708.

It is an arithmetic number, because the mean of its divisors is an integer number (2423001).

Almost surely, 2^25713220 is an apocalyptic number.

25713220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25713220 is an abundant number, since it is smaller than the sum of its proper divisors (32438804).

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

25713220 is a wasteful number, since it uses less digits than its factorization.

25713220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98919 (or 98917 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 25713220 is about 5070.8204464367. The cubic root of 25713220 is about 295.1563663987.

Adding to 25713220 its reverse (2231752), we get a palindrome (27944972).

The spelling of 25713220 in words is "twenty-five million, seven hundred thirteen thousand, two hundred twenty".