131421402545 has 8 divisors (see below), whose sum is σ = 158050774824. Its totient is φ = 104907060864.

The previous prime is 131421402509. The next prime is 131421402547. The reversal of 131421402545 is 545204124131.

It can be written as a sum of positive squares in 4 ways, for example, as 53249716081 + 78171686464 = 230759^2 + 279592^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131421402545 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131421402547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28755134 + ... + 28759703.

It is an arithmetic number, because the mean of its divisors is an integer number (19756346853).

Almost surely, 2^131421402545 is an apocalyptic number.

It is an amenable number.

131421402545 is a deficient number, since it is larger than the sum of its proper divisors (26629372279).

131421402545 is an equidigital number, since it uses as much as digits as its factorization.

131421402545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57515299.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 131421402545 its reverse (545204124131), we get a palindrome (676625526676).

The spelling of 131421402545 in words is "one hundred thirty-one billion, four hundred twenty-one million, four hundred two thousand, five hundred forty-five".