1981225498 has 16 divisors (see below), whose sum is σ = 3468651264. Its totient is φ = 831030480.

The previous prime is 1981225483. The next prime is 1981225501. The reversal of 1981225498 is 8945221891.

It is a super-3 number, since 3×1981225498³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504833 + ... + 1506148.

It is an arithmetic number, because the mean of its divisors is an integer number (216790704).

Almost surely, 2^1981225498 is an apocalyptic number.

1981225498 is a deficient number, since it is larger than the sum of its proper divisors (1487425766).

1981225498 is a wasteful number, since it uses less digits than its factorization.

1981225498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011037.

The product of its digits is 414720, while the sum is 49.

The square root of 1981225498 is about 44510.9593021764. The cubic root of 1981225498 is about 1255.9662506821.

The spelling of 1981225498 in words is "one billion, nine hundred eighty-one million, two hundred twenty-five thousand, four hundred ninety-eight".