53356381 has 8 divisors (see below), whose sum is σ = 58031064. Its totient is φ = 48763200.

The previous prime is 53356379. The next prime is 53356397. The reversal of 53356381 is 18365335.

It can be written as a sum of positive squares in 4 ways, for example, as 793881 + 52562500 = 891^2 + 7250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53356381 - 2¹ = 53356379 is a prime.

It is a super-2 number, since 2×53356381² = 5693806786834322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53356181) 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, 19006 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (7253883).

Almost surely, 2^53356381 is an apocalyptic number.

It is an amenable number.

53356381 is a deficient number, since it is larger than the sum of its proper divisors (4674683).

53356381 is a wasteful number, since it uses less digits than its factorization.

53356381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40751.

The product of its digits is 32400, while the sum is 34.

The square root of 53356381 is about 7304.5452288284. The cubic root of 53356381 is about 376.4686254555.

The spelling of 53356381 in words is "fifty-three million, three hundred fifty-six thousand, three hundred eighty-one".