51423071 has 4 divisors (see below), whose sum is σ = 58769232. Its totient is φ = 44076912.

The previous prime is 51423067. The next prime is 51423109. The reversal of 51423071 is 17032415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51423071 - 2² = 51423067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3673070 + ... + 3673083.

It is an arithmetic number, because the mean of its divisors is an integer number (14692308).

Almost surely, 2^51423071 is an apocalyptic number.

51423071 is a deficient number, since it is larger than the sum of its proper divisors (7346161).

51423071 is an equidigital number, since it uses as much as digits as its factorization.

51423071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346160.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51423071 is about 7170.9881466922. The cubic root of 51423071 is about 371.8655982464.

Adding to 51423071 its reverse (17032415), we get a palindrome (68455486).

The spelling of 51423071 in words is "fifty-one million, four hundred twenty-three thousand, seventy-one".