53878381 has 2 divisors, whose sum is σ = 53878382. Its totient is φ = 53878380.

The previous prime is 53878367. The next prime is 53878393. The reversal of 53878381 is 18387835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38862756 + 15015625 = 6234^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 53878381 - 2²¹ = 51781229 is a prime.

It is a super-2 number, since 2×53878381² = 5805759878362322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53878081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26939190 + 26939191.

It is an arithmetic number, because the mean of its divisors is an integer number (26939191).

Almost surely, 2^53878381 is an apocalyptic number.

It is an amenable number.

53878381 is a deficient number, since it is larger than the sum of its proper divisors (1).

53878381 is an equidigital number, since it uses as much as digits as its factorization.

53878381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 53878381 is about 7340.1894389723. The cubic root of 53878381 is about 377.6923417877.

The spelling of 53878381 in words is "fifty-three million, eight hundred seventy-eight thousand, three hundred eighty-one".