53721417 has 16 divisors (see below), whose sum is σ = 75580160. Its totient is φ = 33847632.

The previous prime is 53721403. The next prime is 53721431. The reversal of 53721417 is 71412735.

It is an interprime number because it is at equal distance from previous prime (53721403) and next prime (53721431).

It is not a de Polignac number, because 53721417 - 2¹⁶ = 53655881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53721497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30318 + ... + 32040.

It is an arithmetic number, because the mean of its divisors is an integer number (4723760).

Almost surely, 2^53721417 is an apocalyptic number.

53721417 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

53721417 is a deficient number, since it is larger than the sum of its proper divisors (21858743).

53721417 is a wasteful number, since it uses less digits than its factorization.

53721417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292.

The product of its digits is 5880, while the sum is 30.

The square root of 53721417 is about 7329.4895456641. The cubic root of 53721417 is about 377.3252077361.

The spelling of 53721417 in words is "fifty-three million, seven hundred twenty-one thousand, four hundred seventeen".