25151620 has 24 divisors (see below), whose sum is σ = 56881944. Its totient is φ = 9286656.

The previous prime is 25151591. The next prime is 25151629. The reversal of 25151620 is 2615152.

It can be written as a sum of positive squares in 4 ways, for example, as 5914624 + 19236996 = 2432^2 + 4386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25151591 and 25151600.

It is not an unprimeable number, because it can be changed into a prime (25151629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48109 + ... + 48628.

It is an arithmetic number, because the mean of its divisors is an integer number (2370081).

Almost surely, 2^25151620 is an apocalyptic number.

25151620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25151620 is an abundant number, since it is smaller than the sum of its proper divisors (31730324).

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

25151620 is a wasteful number, since it uses less digits than its factorization.

25151620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96759 (or 96757 counting only the distinct ones).

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

The square root of 25151620 is about 5015.1390808232. The cubic root of 25151620 is about 292.9917022504.

Adding to 25151620 its reverse (2615152), we get a palindrome (27766772).

The spelling of 25151620 in words is "twenty-five million, one hundred fifty-one thousand, six hundred twenty".