54646021 has 4 divisors (see below), whose sum is σ = 55677132. Its totient is φ = 53614912.

The previous prime is 54646013. The next prime is 54646069. The reversal of 54646021 is 12064645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37332100 + 17313921 = 6110^2 + 4161^2 .

It is a cyclic number.

It is not a de Polignac number, because 54646021 - 2³ = 54646013 is a prime.

It is a super-2 number, since 2×54646021² = 5972375222264882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54640021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515476 + ... + 515581.

It is an arithmetic number, because the mean of its divisors is an integer number (13919283).

Almost surely, 2^54646021 is an apocalyptic number.

It is an amenable number.

54646021 is a deficient number, since it is larger than the sum of its proper divisors (1031111).

54646021 is a wasteful number, since it uses less digits than its factorization.

54646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031110.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 54646021 is about 7392.2947046232. The cubic root of 54646021 is about 379.4776317459.

The spelling of 54646021 in words is "fifty-four million, six hundred forty-six thousand, twenty-one".