54787021 has 4 divisors (see below), whose sum is σ = 54823552. Its totient is φ = 54750492.

The previous prime is 54786959. The next prime is 54787027. The reversal of 54787021 is 12078745.

It is a happy number.

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 54787021 - 2¹⁷ = 54655949 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 (54787027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15915 + ... + 19048.

It is an arithmetic number, because the mean of its divisors is an integer number (13705888).

Almost surely, 2^54787021 is an apocalyptic number.

It is an amenable number.

54787021 is a deficient number, since it is larger than the sum of its proper divisors (36531).

54787021 is a wasteful number, since it uses less digits than its factorization.

54787021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36530.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 54787021 is about 7401.8255180732. The cubic root of 54787021 is about 379.8037329037.

The spelling of 54787021 in words is "fifty-four million, seven hundred eighty-seven thousand, twenty-one".