51670431 has 12 divisors (see below), whose sum is σ = 77209080. Its totient is φ = 33258960.

The previous prime is 51670417. The next prime is 51670439. The reversal of 51670431 is 13407615.

It is not a de Polignac number, because 51670431 - 2⁷ = 51670303 is a prime.

It is a super-3 number, since 3×51670431³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 51670395 and 51670404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51670439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98725 + ... + 99246.

It is an arithmetic number, because the mean of its divisors is an integer number (6434090).

Almost surely, 2^51670431 is an apocalyptic number.

51670431 is a deficient number, since it is larger than the sum of its proper divisors (25538649).

51670431 is a wasteful number, since it uses less digits than its factorization.

51670431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198006 (or 198003 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51670431 is about 7188.2147296808. The cubic root of 51670431 is about 372.4609054657.

The spelling of 51670431 in words is "fifty-one million, six hundred seventy thousand, four hundred thirty-one".