51361624 has 64 divisors (see below), whose sum is σ = 107114400. Its totient is φ = 22984704.

The previous prime is 51361621. The next prime is 51361649. The reversal of 51361624 is 42616315.

Its product of digits (4320) is a multiple of the sum of its prime divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 51361592 and 51361601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51361621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296802 + ... + 296974.

Almost surely, 2^51361624 is an apocalyptic number.

It is an amenable number.

51361624 is an abundant number, since it is smaller than the sum of its proper divisors (55752776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51361624 is a wasteful number, since it uses less digits than its factorization.

51361624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 288 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 51361624 is about 7166.7024495231. The cubic root of 51361624 is about 371.7174213522.

Adding to 51361624 its reverse (42616315), we get a palindrome (93977939).

It can be divided in two parts, 51 and 361624, that added together give a triangular number (361675 = T₈₅₀).

The spelling of 51361624 in words is "fifty-one million, three hundred sixty-one thousand, six hundred twenty-four".