1981508122 has 8 divisors (see below), whose sum is σ = 3242467872. Its totient is φ = 900685500.

The previous prime is 1981508071. The next prime is 1981508141. The reversal of 1981508122 is 2218051891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45034254 + ... + 45034297.

It is an arithmetic number, because the mean of its divisors is an integer number (405308484).

Almost surely, 2^1981508122 is an apocalyptic number.

1981508122 is a deficient number, since it is larger than the sum of its proper divisors (1260959750).

1981508122 is a wasteful number, since it uses less digits than its factorization.

1981508122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90068564.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 1981508122 is about 44514.1339576544. The cubic root of 1981508122 is about 1256.0259694990.

The spelling of 1981508122 in words is "one billion, nine hundred eighty-one million, five hundred eight thousand, one hundred twenty-two".