53720371 has 4 divisors (see below), whose sum is σ = 54242032. Its totient is φ = 53198712.

The previous prime is 53720347. The next prime is 53720377. The reversal of 53720371 is 17302735.

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 53720371 - 2⁷ = 53720243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53720377) 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, 260676 + ... + 260881.

It is an arithmetic number, because the mean of its divisors is an integer number (13560508).

Almost surely, 2^53720371 is an apocalyptic number.

53720371 is a deficient number, since it is larger than the sum of its proper divisors (521661).

53720371 is a wasteful number, since it uses less digits than its factorization.

53720371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521660.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 53720371 is about 7329.4181897338. The cubic root of 53720371 is about 377.3227587765.

The spelling of 53720371 in words is "fifty-three million, seven hundred twenty thousand, three hundred seventy-one".