1331870794531 has 4 divisors (see below), whose sum is σ = 1331887628592. Its totient is φ = 1331853960472.

The previous prime is 1331870794487. The next prime is 1331870794547. The reversal of 1331870794531 is 1354970781331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331870794531 - 2¹⁵ = 1331870761763 is a prime.

It is a super-2 number, since 2×1331870794531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331870794591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8297791 + ... + 8456776.

It is an arithmetic number, because the mean of its divisors is an integer number (332971907148).

Almost surely, 2^{1331870794531} is an apocalyptic number.

1331870794531 is a deficient number, since it is larger than the sum of its proper divisors (16834061).

1331870794531 is an equidigital number, since it uses as much as digits as its factorization.

1331870794531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16834060.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 1331870794531 in words is "one trillion, three hundred thirty-one billion, eight hundred seventy million, seven hundred ninety-four thousand, five hundred thirty-one".