55551141421 has 4 divisors (see below), whose sum is σ = 55671122752. Its totient is φ = 55431160092.

The previous prime is 55551141419. The next prime is 55551141431. The reversal of 55551141421 is 12414115555.

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 55551141421 - 2¹ = 55551141419 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 (55551141431) 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, 59989971 + ... + 59990896.

It is an arithmetic number, because the mean of its divisors is an integer number (13917780688).

Almost surely, 2^55551141421 is an apocalyptic number.

It is an amenable number.

55551141421 is a deficient number, since it is larger than the sum of its proper divisors (119981331).

55551141421 is a wasteful number, since it uses less digits than its factorization.

55551141421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119981330.

The product of its digits is 20000, while the sum is 34.

Adding to 55551141421 its reverse (12414115555), we get a palindrome (67965256976).

The spelling of 55551141421 in words is "fifty-five billion, five hundred fifty-one million, one hundred forty-one thousand, four hundred twenty-one".