51970431 has 8 divisors (see below), whose sum is σ = 69719680. Its totient is φ = 34434072.

The previous prime is 51970333. The next prime is 51970439. The reversal of 51970431 is 13407915.

51970431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51970431 - 2¹⁸ = 51708287 is a prime.

It is a super-2 number, since 2×51970431² = 5401851396651522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51970439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52651 + ... + 53628.

It is an arithmetic number, because the mean of its divisors is an integer number (8714960).

Almost surely, 2^51970431 is an apocalyptic number.

51970431 is a deficient number, since it is larger than the sum of its proper divisors (17749249).

51970431 is a wasteful number, since it uses less digits than its factorization.

51970431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106445.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51970431 is about 7209.0520181228. The cubic root of 51970431 is about 373.1803544327.

The spelling of 51970431 in words is "fifty-one million, nine hundred seventy thousand, four hundred thirty-one".