1931519442 has 16 divisors (see below), whose sum is σ = 4066356960. Its totient is φ = 609953472.

The previous prime is 1931519437. The next prime is 1931519453. The reversal of 1931519442 is 2449151391.

It is a self number, because there is not a number n which added to its sum of digits gives 1931519442.

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, 8471463 + ... + 8471690.

It is an arithmetic number, because the mean of its divisors is an integer number (254147310).

Almost surely, 2^1931519442 is an apocalyptic number.

1931519442 is an abundant number, since it is smaller than the sum of its proper divisors (2134837518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1931519442 is a wasteful number, since it uses less digits than its factorization.

1931519442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16943177.

The product of its digits is 38880, while the sum is 39.

The square root of 1931519442 is about 43949.0550751663. The cubic root of 1931519442 is about 1245.3737133942.

The spelling of 1931519442 in words is "one billion, nine hundred thirty-one million, five hundred nineteen thousand, four hundred forty-two".