56511442 has 16 divisors (see below), whose sum is σ = 91411992. Its totient is φ = 26046720.

The previous prime is 56511431. The next prime is 56511443. The reversal of 56511442 is 24411565.

It can be written as a sum of positive squares in 4 ways, for example, as 20259001 + 36252441 = 4501^2 + 6021^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56511442.

It is not an unprimeable number, because it can be changed into a prime (56511443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34588 + ... + 36184.

Almost surely, 2^56511442 is an apocalyptic number.

56511442 is a deficient number, since it is larger than the sum of its proper divisors (34900550).

56511442 is a wasteful number, since it uses less digits than its factorization.

56511442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973.

The product of its digits is 4800, while the sum is 28.

The square root of 56511442 is about 7517.4092611750. The cubic root of 56511442 is about 383.7474150922.

It can be divided in two parts, 56511 and 442, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 56511442 in words is "fifty-six million, five hundred eleven thousand, four hundred forty-two".