15533020231 has 2 divisors, whose sum is σ = 15533020232. Its totient is φ = 15533020230.

The previous prime is 15533020141. The next prime is 15533020249. The reversal of 15533020231 is 13202033551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15533020231 - 2¹³ = 15533012039 is a prime.

It is a super-2 number, since 2×15533020231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15533020196 and 15533020205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15533020331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7766510115 + 7766510116.

It is an arithmetic number, because the mean of its divisors is an integer number (7766510116).

Almost surely, 2^15533020231 is an apocalyptic number.

15533020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15533020231 is an equidigital number, since it uses as much as digits as its factorization.

15533020231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 15533020231 its reverse (13202033551), we get a palindrome (28735053782).

It can be divided in two parts, 155330 and 20231, that added together give a square (175561 = 419²).

The spelling of 15533020231 in words is "fifteen billion, five hundred thirty-three million, twenty thousand, two hundred thirty-one".