13212554557 has 4 divisors (see below), whose sum is σ = 13212966016. Its totient is φ = 13212143100.

The previous prime is 13212554543. The next prime is 13212554561. The reversal of 13212554557 is 75545521231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13212554557 - 2³¹ = 11065070909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212554567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153069 + ... + 223282.

It is an arithmetic number, because the mean of its divisors is an integer number (3303241504).

Almost surely, 2^13212554557 is an apocalyptic number.

It is an amenable number.

13212554557 is a deficient number, since it is larger than the sum of its proper divisors (411459).

13212554557 is an equidigital number, since it uses as much as digits as its factorization.

13212554557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411458.

The product of its digits is 210000, while the sum is 40.

The spelling of 13212554557 in words is "thirteen billion, two hundred twelve million, five hundred fifty-four thousand, five hundred fifty-seven".