55451577 has 4 divisors (see below), whose sum is σ = 73935440. Its totient is φ = 36967716.

The previous prime is 55451537. The next prime is 55451581. The reversal of 55451577 is 77515455.

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 not a de Polignac number, because 55451577 - 2¹⁶ = 55386041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55451507) 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, 9241927 + ... + 9241932.

It is an arithmetic number, because the mean of its divisors is an integer number (18483860).

Almost surely, 2^55451577 is an apocalyptic number.

It is an amenable number.

55451577 is a deficient number, since it is larger than the sum of its proper divisors (18483863).

55451577 is a wasteful number, since it uses less digits than its factorization.

55451577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18483862.

The product of its digits is 122500, while the sum is 39.

The square root of 55451577 is about 7446.5815647181. The cubic root of 55451577 is about 381.3332140494. Note that the first 3 decimals are identical.

The spelling of 55451577 in words is "fifty-five million, four hundred fifty-one thousand, five hundred seventy-seven".