1273530521631 has 16 divisors (see below), whose sum is σ = 1699125876224. Its totient is φ = 848477882304.

The previous prime is 1273530521623. The next prime is 1273530521677. The reversal of 1273530521631 is 1361250353721.

It is not a de Polignac number, because 1273530521631 - 2³ = 1273530521623 is a prime.

It is a super-2 number, since 2×1273530521631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1273530521631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273530521621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82544340 + ... + 82559766.

It is an arithmetic number, because the mean of its divisors is an integer number (106195367264).

Almost surely, 2^{1273530521631} is an apocalyptic number.

1273530521631 is a deficient number, since it is larger than the sum of its proper divisors (425595354593).

1273530521631 is a wasteful number, since it uses less digits than its factorization.

1273530521631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31230.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 1273530521631 in words is "one trillion, two hundred seventy-three billion, five hundred thirty million, five hundred twenty-one thousand, six hundred thirty-one".