54615421 has 4 divisors (see below), whose sum is σ = 62417632. Its totient is φ = 46813212.

The previous prime is 54615413. The next prime is 54615427. The reversal of 54615421 is 12451645.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12451645 = 5 ⋅2490329.

It is a cyclic number.

It is not a de Polignac number, because 54615421 - 2³ = 54615413 is a prime.

It is a super-2 number, since 2×54615421² = 5965688422014482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54615421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54615427) 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, 3901095 + ... + 3901108.

It is an arithmetic number, because the mean of its divisors is an integer number (15604408).

Almost surely, 2^54615421 is an apocalyptic number.

It is an amenable number.

54615421 is a deficient number, since it is larger than the sum of its proper divisors (7802211).

54615421 is an equidigital number, since it uses as much as digits as its factorization.

54615421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7802210.

The product of its digits is 4800, while the sum is 28.

The square root of 54615421 is about 7390.2246921186. The cubic root of 54615421 is about 379.4067867973.

The spelling of 54615421 in words is "fifty-four million, six hundred fifteen thousand, four hundred twenty-one".