1534631243 has 2 divisors, whose sum is σ = 1534631244. Its totient is φ = 1534631242.

The previous prime is 1534631233. The next prime is 1534631249. The reversal of 1534631243 is 3421364351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1534631243 - 2¹⁴ = 1534614859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1534631249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767315621 + 767315622.

It is an arithmetic number, because the mean of its divisors is an integer number (767315622).

Almost surely, 2^1534631243 is an apocalyptic number.

1534631243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534631243 is an equidigital number, since it uses as much as digits as its factorization.

1534631243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 1534631243 is about 39174.3697205201. The cubic root of 1534631243 is about 1153.4568305745.

Adding to 1534631243 its reverse (3421364351), we get a palindrome (4955995594).

The spelling of 1534631243 in words is "one billion, five hundred thirty-four million, six hundred thirty-one thousand, two hundred forty-three".