1981225462 has 16 divisors (see below), whose sum is σ = 2982021120. Its totient is φ = 987225192.

The previous prime is 1981225447. The next prime is 1981225471. The reversal of 1981225462 is 2645221891.

It is a happy number.

It is a super-3 number, since 3×1981225462³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 1085883 + ... + 1087705.

It is an arithmetic number, because the mean of its divisors is an integer number (186376320).

Almost surely, 2^1981225462 is an apocalyptic number.

1981225462 is a deficient number, since it is larger than the sum of its proper divisors (1000795658).

1981225462 is a wasteful number, since it uses less digits than its factorization.

1981225462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387.

The product of its digits is 69120, while the sum is 40.

The square root of 1981225462 is about 44510.9588977816. The cubic root of 1981225462 is about 1255.9662430749.

The spelling of 1981225462 in words is "one billion, nine hundred eighty-one million, two hundred twenty-five thousand, four hundred sixty-two".