30221425 has 36 divisors (see below), whose sum is σ = 42479424. Its totient is φ = 21278400.

The previous prime is 30221369. The next prime is 30221431. The reversal of 30221425 is 52412203.

30221425 is a nontrivial binomial coefficient, being equal to C(7775, 2).

It is not a de Polignac number, because 30221425 - 2⁹ = 30220913 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 97020 + ... + 97330.

It is an arithmetic number, because the mean of its divisors is an integer number (1179984).

Almost surely, 2^30221425 is an apocalyptic number.

30221425 is the 7774-th triangular number.

30221425 is the 2592-nd centered nonagonal number.

It is an amenable number.

30221425 is a deficient number, since it is larger than the sum of its proper divisors (12257999).

30221425 is a wasteful number, since it uses less digits than its factorization.

30221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 30221425 is about 5497.4016589658. The cubic root of 30221425 is about 311.4858429808.

Adding to 30221425 its reverse (52412203), we get a palindrome (82633628).

The spelling of 30221425 in words is "thirty million, two hundred twenty-one thousand, four hundred twenty-five".