51071407 has 6 divisors (see below), whose sum is σ = 52894088. Its totient is φ = 49309512.

The previous prime is 51071393. The next prime is 51071429. The reversal of 51071407 is 70417015.

It is a de Polignac number, because none of the positive numbers 2^k-51071407 is a prime.

It is a super-2 number, since 2×51071407² = 5216577225919298, 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 (51071437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29523 + ... + 31204.

Almost surely, 2^51071407 is an apocalyptic number.

51071407 is a deficient number, since it is larger than the sum of its proper divisors (1822681).

51071407 is an equidigital number, since it uses as much as digits as its factorization.

51071407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60785 (or 60756 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 51071407 is about 7146.4261697719. The cubic root of 51071407 is about 371.0159732348.

It can be divided in two parts, 510 and 71407, that added together give a palindrome (71917).

The spelling of 51071407 in words is "fifty-one million, seventy-one thousand, four hundred seven".