56061555 has 32 divisors (see below), whose sum is σ = 100251648. Its totient is φ = 26515200.

The previous prime is 56061541. The next prime is 56061559. The reversal of 56061555 is 55516065.

It is not a de Polignac number, because 56061555 - 2⁶ = 56061491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (56061559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2622 + ... + 10908.

It is an arithmetic number, because the mean of its divisors is an integer number (3132864).

Almost surely, 2^56061555 is an apocalyptic number.

56061555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56061555 is a deficient number, since it is larger than the sum of its proper divisors (44190093).

56061555 is a wasteful number, since it uses less digits than its factorization.

56061555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 56061555 is about 7487.4264604068. The cubic root of 56061555 is about 382.7263643660.

Subtracting from 56061555 its reverse (55516065), we obtain a triangular number (545490 = T₁₀₄₄).

It can be divided in two parts, 56061 and 555, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 56061555 in words is "fifty-six million, sixty-one thousand, five hundred fifty-five".