53139933 has 36 divisors (see below), whose sum is σ = 96436704. Its totient is φ = 27601200.

The previous prime is 53139929. The next prime is 53139937. The reversal of 53139933 is 33993135.

53139933 is a `hidden beast` number, since 531 + 3 + 99 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (53139929) and next prime (53139937).

It is not a de Polignac number, because 53139933 - 2² = 53139929 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53139937) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4138 + ... + 11108.

Almost surely, 2^53139933 is an apocalyptic number.

It is an amenable number.

53139933 is a deficient number, since it is larger than the sum of its proper divisors (43296771).

53139933 is a wasteful number, since it uses less digits than its factorization.

53139933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006 (or 6992 counting only the distinct ones).

The product of its digits is 32805, while the sum is 36.

The square root of 53139933 is about 7289.7141919282. The cubic root of 53139933 is about 375.9588687654.

The spelling of 53139933 in words is "fifty-three million, one hundred thirty-nine thousand, nine hundred thirty-three".