53006391 has 12 divisors (see below), whose sum is σ = 81068832. Its totient is φ = 33258816.

The previous prime is 53006389. The next prime is 53006411. The reversal of 53006391 is 19360035.

It is not a de Polignac number, because 53006391 - 2¹ = 53006389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53006321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173071 + ... + 173376.

It is an arithmetic number, because the mean of its divisors is an integer number (6755736).

Almost surely, 2^53006391 is an apocalyptic number.

53006391 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

53006391 is a deficient number, since it is larger than the sum of its proper divisors (28062441).

53006391 is a wasteful number, since it uses less digits than its factorization.

53006391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346470 (or 346467 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 53006391 is about 7280.5488117312. The cubic root of 53006391 is about 375.6436731940.

The spelling of 53006391 in words is "fifty-three million, six thousand, three hundred ninety-one".