51212413 has 8 divisors (see below), whose sum is σ = 59520960. Its totient is φ = 43152000.

The previous prime is 51212407. The next prime is 51212459. The reversal of 51212413 is 31421215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51212413 is a prime.

It is a super-2 number, since 2×51212413² = 5245422490565138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51210413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61588 + ... + 62413.

It is an arithmetic number, because the mean of its divisors is an integer number (7440120).

Almost surely, 2^51212413 is an apocalyptic number.

It is an amenable number.

51212413 is a deficient number, since it is larger than the sum of its proper divisors (8308547).

51212413 is a wasteful number, since it uses less digits than its factorization.

51212413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124067.

The product of its digits is 240, while the sum is 19.

The square root of 51212413 is about 7156.2848601771. The cubic root of 51212413 is about 371.3571126196.

Adding to 51212413 its reverse (31421215), we get a palindrome (82633628).

The spelling of 51212413 in words is "fifty-one million, two hundred twelve thousand, four hundred thirteen".