1251931204482 has 48 divisors (see below), whose sum is σ = 2980392494112. Its totient is φ = 349376146560.

The previous prime is 1251931204481. The next prime is 1251931204541. The reversal of 1251931204482 is 2844021391521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1251931204481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49502119 + ... + 49527402.

It is an arithmetic number, because the mean of its divisors is an integer number (62091510294).

Almost surely, 2^{1251931204482} is an apocalyptic number.

1251931204482 is an abundant number, since it is smaller than the sum of its proper divisors (1728461289630).

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

1251931204482 is a wasteful number, since it uses less digits than its factorization.

1251931204482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99029583 (or 99029576 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 1251931204482 in words is "one trillion, two hundred fifty-one billion, nine hundred thirty-one million, two hundred four thousand, four hundred eighty-two".