15531131053 has 2 divisors, whose sum is σ = 15531131054. Its totient is φ = 15531131052.

The previous prime is 15531131039. The next prime is 15531131081. The reversal of 15531131053 is 35013113551.

It is an a-pointer prime, because the next prime (15531131081) can be obtained adding 15531131053 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14867656489 + 663474564 = 121933^2 + 25758^2 .

It is a cyclic number.

It is not a de Polignac number, because 15531131053 - 2³³ = 6941196461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15531131653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7765565526 + 7765565527.

It is an arithmetic number, because the mean of its divisors is an integer number (7765565527).

Almost surely, 2^15531131053 is an apocalyptic number.

It is an amenable number.

15531131053 is a deficient number, since it is larger than the sum of its proper divisors (1).

15531131053 is an equidigital number, since it uses as much as digits as its factorization.

15531131053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 28.

The spelling of 15531131053 in words is "fifteen billion, five hundred thirty-one million, one hundred thirty-one thousand, fifty-three".