55154561 has 16 divisors (see below), whose sum is σ = 69642240. Its totient is φ = 42428880.

The previous prime is 55154551. The next prime is 55154563. The reversal of 55154561 is 16545155.

It is a cyclic number.

It is not a de Polignac number, because 55154561 - 2¹⁸ = 54892417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55154563) 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, 1550 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (4352640).

Almost surely, 2^55154561 is an apocalyptic number.

It is an amenable number.

55154561 is a deficient number, since it is larger than the sum of its proper divisors (14487679).

55154561 is a wasteful number, since it uses less digits than its factorization.

55154561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9164.

The product of its digits is 15000, while the sum is 32.

The square root of 55154561 is about 7426.6116769359. The cubic root of 55154561 is about 380.6511481322.

The spelling of 55154561 in words is "fifty-five million, one hundred fifty-four thousand, five hundred sixty-one".