55540214521 has 4 divisors (see below), whose sum is σ = 60589324944. Its totient is φ = 50491104100.

The previous prime is 55540214501. The next prime is 55540214533. The reversal of 55540214521 is 12541204555.

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 55540214521 - 2²⁵ = 55506660089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55540214501) 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, 2524555195 + ... + 2524555216.

It is an arithmetic number, because the mean of its divisors is an integer number (15147331236).

Almost surely, 2^55540214521 is an apocalyptic number.

It is an amenable number.

55540214521 is a deficient number, since it is larger than the sum of its proper divisors (5049110423).

55540214521 is a wasteful number, since it uses less digits than its factorization.

55540214521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049110422.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 55540214521 in words is "fifty-five billion, five hundred forty million, two hundred fourteen thousand, five hundred twenty-one".