51051031 has 4 divisors (see below), whose sum is σ = 52014312. Its totient is φ = 50087752.

The previous prime is 51051029. The next prime is 51051037. The reversal of 51051031 is 13015015.

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 51051031 - 2¹ = 51051029 is a prime.

It is a super-2 number, since 2×51051031² = 5212415532325922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51050996 and 51051014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51051037) 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, 481561 + ... + 481666.

It is an arithmetic number, because the mean of its divisors is an integer number (13003578).

Almost surely, 2^51051031 is an apocalyptic number.

51051031 is a deficient number, since it is larger than the sum of its proper divisors (963281).

51051031 is an equidigital number, since it uses as much as digits as its factorization.

51051031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963280.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 51051031 is about 7145.0004198740. Note that the first 3 decimals coincide. The cubic root of 51051031 is about 370.9666251584.

Adding to 51051031 its reverse (13015015), we get a palindrome (64066046).

The spelling of 51051031 in words is "fifty-one million, fifty-one thousand, thirty-one".