51346613 has 4 divisors (see below), whose sum is σ = 54367020. Its totient is φ = 48326208.

The previous prime is 51346597. The next prime is 51346627. The reversal of 51346613 is 31664315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31664315 = 5 ⋅6332863.

It can be written as a sum of positive squares in 2 ways, for example, as 33849124 + 17497489 = 5818^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 51346613 - 2⁴ = 51346597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51346643) 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, 1510178 + ... + 1510211.

It is an arithmetic number, because the mean of its divisors is an integer number (13591755).

Almost surely, 2^51346613 is an apocalyptic number.

It is an amenable number.

51346613 is a deficient number, since it is larger than the sum of its proper divisors (3020407).

51346613 is a wasteful number, since it uses less digits than its factorization.

51346613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020406.

The product of its digits is 6480, while the sum is 29.

The square root of 51346613 is about 7165.6550991518. The cubic root of 51346613 is about 371.6812049876.

The spelling of 51346613 in words is "fifty-one million, three hundred forty-six thousand, six hundred thirteen".