55376421 has 8 divisors (see below), whose sum is σ = 73965504. Its totient is φ = 36852480.

The previous prime is 55376417. The next prime is 55376437. The reversal of 55376421 is 12467355.

Added to its reverse (12467355) it gives a triangular number (67843776 = T₁₁₆₄₈).

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

It is not a de Polignac number, because 55376421 - 2² = 55376417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55376401) 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, 14265 + ... + 17726.

It is an arithmetic number, because the mean of its divisors is an integer number (9245688).

Almost surely, 2^55376421 is an apocalyptic number.

It is an amenable number.

55376421 is a deficient number, since it is larger than the sum of its proper divisors (18589083).

55376421 is a wasteful number, since it uses less digits than its factorization.

55376421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32571.

The product of its digits is 25200, while the sum is 33.

The square root of 55376421 is about 7441.5335113134. The cubic root of 55376421 is about 381.1608568435.

Adding to 55376421 its reverse (12467355), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 55376421 in words is "fifty-five million, three hundred seventy-six thousand, four hundred twenty-one".