54822781 has 16 divisors (see below), whose sum is σ = 61351920. Its totient is φ = 48660480.

The previous prime is 54822763. The next prime is 54822799. The reversal of 54822781 is 18722845.

It is an interprime number because it is at equal distance from previous prime (54822763) and next prime (54822799).

It can be written as a sum of positive squares in 8 ways, for example, as 27092025 + 27730756 = 5205^2 + 5266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54822781 is a prime.

It is a super-2 number, since 2×54822781² = 6011074633147922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54822781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54822701) 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, 38205 + ... + 39613.

It is an arithmetic number, because the mean of its divisors is an integer number (3834495).

Almost surely, 2^54822781 is an apocalyptic number.

It is an amenable number.

54822781 is a deficient number, since it is larger than the sum of its proper divisors (6529139).

54822781 is a wasteful number, since it uses less digits than its factorization.

54822781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

The product of its digits is 35840, while the sum is 37.

The square root of 54822781 is about 7404.2407443302. The cubic root of 54822781 is about 379.8863487455.

The spelling of 54822781 in words is "fifty-four million, eight hundred twenty-two thousand, seven hundred eighty-one".