131503553 has 2 divisors, whose sum is σ = 131503554. Its totient is φ = 131503552.

The previous prime is 131503481. The next prime is 131503577. The reversal of 131503553 is 355305131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124701889 + 6801664 = 11167^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 131503553 - 2¹² = 131499457 is a prime.

It is not a weakly prime, because it can be changed into another prime (131503583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65751776 + 65751777.

It is an arithmetic number, because the mean of its divisors is an integer number (65751777).

Almost surely, 2^131503553 is an apocalyptic number.

It is an amenable number.

131503553 is a deficient number, since it is larger than the sum of its proper divisors (1).

131503553 is an equidigital number, since it uses as much as digits as its factorization.

131503553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 26.

The square root of 131503553 is about 11467.4998582952. The cubic root of 131503553 is about 508.5252191341.

Adding to 131503553 its reverse (355305131), we get a palindrome (486808684).

The spelling of 131503553 in words is "one hundred thirty-one million, five hundred three thousand, five hundred fifty-three".