19130531 has 6 divisors (see below), whose sum is σ = 22253940. Its totient is φ = 16397556.

The previous prime is 19130521. The next prime is 19130533. The reversal of 19130531 is 13503191.

It is a de Polignac number, because none of the positive numbers 2^k-19130531 is a prime.

It is a super-2 number, since 2×19130531² = 731954432683922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19130497 and 19130506.

It is not an unprimeable number, because it can be changed into a prime (19130533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195161 + ... + 195258.

It is an arithmetic number, because the mean of its divisors is an integer number (3708990).

Almost surely, 2^19130531 is an apocalyptic number.

19130531 is a deficient number, since it is larger than the sum of its proper divisors (3123409).

19130531 is an equidigital number, since it uses as much as digits as its factorization.

19130531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390433 (or 390426 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 19130531 is about 4373.8462478693. The cubic root of 19130531 is about 267.4498394898.

The spelling of 19130531 in words is "nineteen million, one hundred thirty thousand, five hundred thirty-one".