51953421 has 16 divisors (see below), whose sum is σ = 75176640. Its totient is φ = 31724160.

The previous prime is 51953401. The next prime is 51953441. The reversal of 51953421 is 12435915.

It is an interprime number because it is at equal distance from previous prime (51953401) and next prime (51953441).

It is not a de Polignac number, because 51953421 - 2⁶ = 51953357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51953401) 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, 25 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (4698540).

Almost surely, 2^51953421 is an apocalyptic number.

It is an amenable number.

51953421 is a deficient number, since it is larger than the sum of its proper divisors (23223219).

51953421 is a wasteful number, since it uses less digits than its factorization.

51953421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316.

The product of its digits is 5400, while the sum is 30.

The square root of 51953421 is about 7207.8721548041. The cubic root of 51953421 is about 373.1396358268.

The spelling of 51953421 in words is "fifty-one million, nine hundred fifty-three thousand, four hundred twenty-one".