55111545 has 12 divisors (see below), whose sum is σ = 95526756. Its totient is φ = 29392800.

The previous prime is 55111541. The next prime is 55111561. The reversal of 55111545 is 54511155.

55111545 is a `hidden beast` number, since 5 + 5 + 111 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38489616 + 16621929 = 6204^2 + 4077^2 .

It is not a de Polignac number, because 55111545 - 2² = 55111541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55111541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612306 + ... + 612395.

It is an arithmetic number, because the mean of its divisors is an integer number (7960563).

Almost surely, 2^55111545 is an apocalyptic number.

It is an amenable number.

55111545 is a deficient number, since it is larger than the sum of its proper divisors (40415211).

55111545 is a wasteful number, since it uses less digits than its factorization.

55111545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224712 (or 1224709 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 55111545 is about 7423.7150403285. The cubic root of 55111545 is about 380.5521635808.

It can be divided in two parts, 5511 and 1545, that added together give a square (7056 = 84²).

The spelling of 55111545 in words is "fifty-five million, one hundred eleven thousand, five hundred forty-five".