55650521 has 4 divisors (see below), whose sum is σ = 55676544. Its totient is φ = 55624500.

The previous prime is 55650509. The next prime is 55650527. The reversal of 55650521 is 12505655.

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: 12505655 = 5 ⋅2501131.

It is a cyclic number.

It is not a de Polignac number, because 55650521 - 2¹⁰ = 55649497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55650527) 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, 9485 + ... + 14186.

It is an arithmetic number, because the mean of its divisors is an integer number (13919136).

Almost surely, 2^55650521 is an apocalyptic number.

It is an amenable number.

55650521 is a deficient number, since it is larger than the sum of its proper divisors (26023).

55650521 is a wasteful number, since it uses less digits than its factorization.

55650521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26022.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 55650521 is about 7459.9276806146. The cubic root of 55650521 is about 381.7887070132.

The spelling of 55650521 in words is "fifty-five million, six hundred fifty thousand, five hundred twenty-one".