55285915 has 16 divisors (see below), whose sum is σ = 70031520. Its totient is φ = 41783040.

The previous prime is 55285913. The next prime is 55285931. The reversal of 55285915 is 51958255.

55285915 = T₁₀₃₁ + T₁₀₃₂ + ... + T₁₁₂₅.

It is not a de Polignac number, because 55285915 - 2¹ = 55285913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55285913) 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, 48937 + ... + 50053.

It is an arithmetic number, because the mean of its divisors is an integer number (4376970).

Almost surely, 2^55285915 is an apocalyptic number.

55285915 is a deficient number, since it is larger than the sum of its proper divisors (14745605).

55285915 is a wasteful number, since it uses less digits than its factorization.

55285915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its digits is 90000, while the sum is 40.

The square root of 55285915 is about 7435.4498855147. The cubic root of 55285915 is about 380.9530899826.

The spelling of 55285915 in words is "fifty-five million, two hundred eighty-five thousand, nine hundred fifteen".