53971507 has 4 divisors (see below), whose sum is σ = 53995216. Its totient is φ = 53947800.

The previous prime is 53971487. The next prime is 53971513. The reversal of 53971507 is 70517935.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70517935 = 5 ⋅14103587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53971507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53971537) 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, 8028 + ... + 13129.

It is an arithmetic number, because the mean of its divisors is an integer number (13498804).

Almost surely, 2^53971507 is an apocalyptic number.

53971507 is a deficient number, since it is larger than the sum of its proper divisors (23709).

53971507 is a wasteful number, since it uses less digits than its factorization.

53971507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23708.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 53971507 is about 7346.5302694537. The cubic root of 53971507 is about 377.9098237716.

The spelling of 53971507 in words is "fifty-three million, nine hundred seventy-one thousand, five hundred seven".