53665031 has 4 divisors (see below), whose sum is σ = 61331472. Its totient is φ = 45998592.

The previous prime is 53665019. The next prime is 53665069. The reversal of 53665031 is 13056635.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53665031 - 2²² = 49470727 is a prime.

It is a super-2 number, since 2×53665031² = 5759871104461922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53664985 and 53665003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53665091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3833210 + ... + 3833223.

It is an arithmetic number, because the mean of its divisors is an integer number (15332868).

Almost surely, 2^53665031 is an apocalyptic number.

53665031 is a deficient number, since it is larger than the sum of its proper divisors (7666441).

53665031 is an equidigital number, since it uses as much as digits as its factorization.

53665031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666440.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 53665031 is about 7325.6420196458. The cubic root of 53665031 is about 377.1931480076.

The spelling of 53665031 in words is "fifty-three million, six hundred sixty-five thousand, thirty-one".