54699021 has 24 divisors (see below), whose sum is σ = 86702616. Its totient is φ = 33022080.

The previous prime is 54699019. The next prime is 54699079. The reversal of 54699021 is 12099645.

54699021 is a `hidden beast` number, since 546 + 9 + 90 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7502121 + 47196900 = 2739^2 + 6870^2 .

It is not a de Polignac number, because 54699021 - 2¹ = 54699019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54699011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1791 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (3612609).

Almost surely, 2^54699021 is an apocalyptic number.

It is an amenable number.

54699021 is a deficient number, since it is larger than the sum of its proper divisors (32003595).

54699021 is a wasteful number, since it uses less digits than its factorization.

54699021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8893 (or 8890 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 54699021 is about 7395.8786496264. The cubic root of 54699021 is about 379.6002745017.

The spelling of 54699021 in words is "fifty-four million, six hundred ninety-nine thousand, twenty-one".