19212143131 has 4 divisors (see below), whose sum is σ = 19212612232. Its totient is φ = 19211674032.

The previous prime is 19212143129. The next prime is 19212143147. The reversal of 19212143131 is 13134121291.

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 19212143131 - 2¹ = 19212143129 is a prime.

It is a super-2 number, since 2×19212143131² (a number of 21 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 19212143131.

It is not an unprimeable number, because it can be changed into a prime (19212143101) 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, 166545 + ... + 257218.

It is an arithmetic number, because the mean of its divisors is an integer number (4803153058).

Almost surely, 2^19212143131 is an apocalyptic number.

19212143131 is a deficient number, since it is larger than the sum of its proper divisors (469101).

19212143131 is an equidigital number, since it uses as much as digits as its factorization.

19212143131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469100.

The product of its digits is 1296, while the sum is 28.

The spelling of 19212143131 in words is "nineteen billion, two hundred twelve million, one hundred forty-three thousand, one hundred thirty-one".