55561457 has 16 divisors (see below), whose sum is σ = 69056640. Its totient is φ = 43607808.

The previous prime is 55561409. The next prime is 55561463. The reversal of 55561457 is 75416555.

It is a cyclic number.

It is not a de Polignac number, because 55561457 - 2¹² = 55557361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55561457.

It is not an unprimeable number, because it can be changed into a prime (55561487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1907 + ... + 10712.

It is an arithmetic number, because the mean of its divisors is an integer number (4316040).

Almost surely, 2^55561457 is an apocalyptic number.

It is an amenable number.

55561457 is a deficient number, since it is larger than the sum of its proper divisors (13495183).

55561457 is a wasteful number, since it uses less digits than its factorization.

55561457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12680.

The product of its digits is 105000, while the sum is 38.

The square root of 55561457 is about 7453.9557954149. The cubic root of 55561457 is about 381.5849246411.

The spelling of 55561457 in words is "fifty-five million, five hundred sixty-one thousand, four hundred fifty-seven".