75131021442 has 16 divisors (see below), whose sum is σ = 151445210112. Its totient is φ = 24846479280.

The previous prime is 75131021401. The next prime is 75131021503. The reversal of 75131021442 is 24412013157.

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, 49297809 + ... + 49299332.

It is an arithmetic number, because the mean of its divisors is an integer number (9465325632).

Almost surely, 2^75131021442 is an apocalyptic number.

75131021442 is an abundant number, since it is smaller than the sum of its proper divisors (76314188670).

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

75131021442 is a wasteful number, since it uses less digits than its factorization.

75131021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98597273.

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 75131021442 its reverse (24412013157), we get a palindrome (99543034599).

The spelling of 75131021442 in words is "seventy-five billion, one hundred thirty-one million, twenty-one thousand, four hundred forty-two".