55454521 has 8 divisors (see below), whose sum is σ = 58726080. Its totient is φ = 52218288.

The previous prime is 55454519. The next prime is 55454533. The reversal of 55454521 is 12545455.

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

It is a cyclic number.

It is not a de Polignac number, because 55454521 - 2¹ = 55454519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55451521) 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, 5566 + ... + 11911.

It is an arithmetic number, because the mean of its divisors is an integer number (7340760).

Almost surely, 2^55454521 is an apocalyptic number.

It is an amenable number.

55454521 is a deficient number, since it is larger than the sum of its proper divisors (3271559).

55454521 is a wasteful number, since it uses less digits than its factorization.

55454521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17663.

The product of its digits is 20000, while the sum is 31.

The square root of 55454521 is about 7446.7792366902. The cubic root of 55454521 is about 381.3399624305.

Adding to 55454521 its reverse (12545455), we get a palindrome (67999976).

The spelling of 55454521 in words is "fifty-five million, four hundred fifty-four thousand, five hundred twenty-one".