1531230101 has 2 divisors, whose sum is σ = 1531230102. Its totient is φ = 1531230100.

The previous prime is 1531230079. The next prime is 1531230119. The reversal of 1531230101 is 1010321351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1159743025 + 371487076 = 34055^2 + 19274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1531230101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1531230101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531230161) 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 as a sum of consecutive naturals, namely, 765615050 + 765615051.

It is an arithmetic number, because the mean of its divisors is an integer number (765615051).

Almost surely, 2^1531230101 is an apocalyptic number.

It is an amenable number.

1531230101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531230101 is an equidigital number, since it uses as much as digits as its factorization.

1531230101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1531230101 is about 39130.9353453249. The cubic root of 1531230101 is about 1152.6040801728.

Adding to 1531230101 its reverse (1010321351), we get a palindrome (2541551452).

The spelling of 1531230101 in words is "one billion, five hundred thirty-one million, two hundred thirty thousand, one hundred one".