51158629 has 4 divisors (see below), whose sum is σ = 51197580. Its totient is φ = 51119680.

The previous prime is 51158617. The next prime is 51158641. The reversal of 51158629 is 92685115.

51158629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92685115 = 5 ⋅18537023.

It is an interprime number because it is at equal distance from previous prime (51158617) and next prime (51158641).

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 30228004 = 4575^2 + 5498^2 .

It is a cyclic number.

It is not a de Polignac number, because 51158629 - 2⁷ = 51158501 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 (51158329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17434 + ... + 20155.

It is an arithmetic number, because the mean of its divisors is an integer number (12799395).

Almost surely, 2^51158629 is an apocalyptic number.

It is an amenable number.

51158629 is a deficient number, since it is larger than the sum of its proper divisors (38951).

51158629 is a wasteful number, since it uses less digits than its factorization.

51158629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38950.

The product of its digits is 21600, while the sum is 37.

The square root of 51158629 is about 7152.5260572751. The cubic root of 51158629 is about 371.2270655870.

The spelling of 51158629 in words is "fifty-one million, one hundred fifty-eight thousand, six hundred twenty-nine".