55474521 has 4 divisors (see below), whose sum is σ = 73966032. Its totient is φ = 36983012.

The previous prime is 55474493. The next prime is 55474571. The reversal of 55474521 is 12547455.

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 55474521 - 2⁶ = 55474457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55474571) 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, 9245751 + ... + 9245756.

It is an arithmetic number, because the mean of its divisors is an integer number (18491508).

Almost surely, 2^55474521 is an apocalyptic number.

It is an amenable number.

55474521 is a deficient number, since it is larger than the sum of its proper divisors (18491511).

55474521 is a wasteful number, since it uses less digits than its factorization.

55474521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18491510.

The product of its digits is 28000, while the sum is 33.

The square root of 55474521 is about 7448.1219780559. The cubic root of 55474521 is about 381.3858010890.

The spelling of 55474521 in words is "fifty-five million, four hundred seventy-four thousand, five hundred twenty-one".