1549980225 has 48 divisors (see below), whose sum is σ = 2855174400. Its totient is φ = 824391360.

The previous prime is 1549980221. The next prime is 1549980227. The reversal of 1549980225 is 5220899451.

It is a happy number.

1549980225 is a `hidden beast` number, since 1 + 549 + 9 + 80 + 2 + 25 = 666.

It is not a de Polignac number, because 1549980225 - 2² = 1549980221 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1549980221) 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 47 ways as a sum of consecutive naturals, for example, 259624 + ... + 265526.

It is an arithmetic number, because the mean of its divisors is an integer number (59482800).

Almost surely, 2^1549980225 is an apocalyptic number.

1549980225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1549980225 is a deficient number, since it is larger than the sum of its proper divisors (1305194175).

1549980225 is a wasteful number, since it uses less digits than its factorization.

1549980225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311 (or 6300 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1549980225 is about 39369.7882265069. The cubic root of 1549980225 is about 1157.2896056293.

The spelling of 1549980225 in words is "one billion, five hundred forty-nine million, nine hundred eighty thousand, two hundred twenty-five".