30251225 has 6 divisors (see below), whose sum is σ = 37511550. Its totient is φ = 24200960.

The previous prime is 30251159. The next prime is 30251239. The reversal of 30251225 is 52215203.

It can be written as a sum of positive squares in 3 ways, for example, as 10705984 + 19545241 = 3272^2 + 4421^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30251225 is a prime.

It is a super-2 number, since 2×30251225² = 1830273228001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30251197 and 30251206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605000 + ... + 605049.

It is an arithmetic number, because the mean of its divisors is an integer number (6251925).

Almost surely, 2^30251225 is an apocalyptic number.

It is an amenable number.

30251225 is a deficient number, since it is larger than the sum of its proper divisors (7260325).

30251225 is a wasteful number, since it uses less digits than its factorization.

30251225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210059 (or 1210054 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30251225 is about 5500.1113625089. Note that the first 3 decimals coincide. The cubic root of 30251225 is about 311.5881901163.

Adding to 30251225 its reverse (52215203), we get a palindrome (82466428).

It can be divided in two parts, 3025 and 1225, that multiplied together give a square (3705625 = 1925²).

The spelling of 30251225 in words is "thirty million, two hundred fifty-one thousand, two hundred twenty-five".