51150031 has 4 divisors (see below), whose sum is σ = 52800064. Its totient is φ = 49500000.

The previous prime is 51150023. The next prime is 51150037. The reversal of 51150031 is 13005115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13005115 = 5 ⋅2601023.

It is a cyclic number.

It is not a de Polignac number, because 51150031 - 2³ = 51150023 is a prime.

It is a super-2 number, since 2×51150031² = 5232651342601922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 51149987 and 51150014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51150037) 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, 824970 + ... + 825031.

It is an arithmetic number, because the mean of its divisors is an integer number (13200016).

Almost surely, 2^51150031 is an apocalyptic number.

51150031 is a deficient number, since it is larger than the sum of its proper divisors (1650033).

51150031 is a wasteful number, since it uses less digits than its factorization.

51150031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650032.

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

The square root of 51150031 is about 7151.9249856245. The cubic root of 51150031 is about 371.2062676024.

Adding to 51150031 its reverse (13005115), we get a palindrome (64155146).

The spelling of 51150031 in words is "fifty-one million, one hundred fifty thousand, thirty-one".