54036781 has 2 divisors, whose sum is σ = 54036782. Its totient is φ = 54036780.

The previous prime is 54036757. The next prime is 54036797. The reversal of 54036781 is 18763045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47955625 + 6081156 = 6925^2 + 2466^2 .

It is a cyclic number.

It is not a de Polignac number, because 54036781 - 2¹³ = 54028589 is a prime.

It is a super-2 number, since 2×54036781² = 5839947401683922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54036721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27018390 + 27018391.

It is an arithmetic number, because the mean of its divisors is an integer number (27018391).

Almost surely, 2^54036781 is an apocalyptic number.

It is an amenable number.

54036781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54036781 is an equidigital number, since it uses as much as digits as its factorization.

54036781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 54036781 is about 7350.9714324027. The cubic root of 54036781 is about 378.0621124475.

The spelling of 54036781 in words is "fifty-four million, thirty-six thousand, seven hundred eighty-one".