54707021 has 4 divisors (see below), whose sum is σ = 56593500. Its totient is φ = 52820544.

The previous prime is 54707017. The next prime is 54707027. The reversal of 54707021 is 12070745.

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 35880100 + 18826921 = 5990^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 54707021 - 2² = 54707017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54707027) 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, 943196 + ... + 943253.

It is an arithmetic number, because the mean of its divisors is an integer number (14148375).

Almost surely, 2^54707021 is an apocalyptic number.

It is an amenable number.

54707021 is a deficient number, since it is larger than the sum of its proper divisors (1886479).

54707021 is a wasteful number, since it uses less digits than its factorization.

54707021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886478.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 54707021 is about 7396.4194716092. The cubic root of 54707021 is about 379.6187797333.

Adding to 54707021 its reverse (12070745), we get a palindrome (66777766).

The spelling of 54707021 in words is "fifty-four million, seven hundred seven thousand, twenty-one".