51007620 has 48 divisors (see below), whose sum is σ = 143394048. Its totient is φ = 13547520.

The previous prime is 51007613. The next prime is 51007631. The reversal of 51007620 is 2670015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14692 + ... + 17828.

It is an arithmetic number, because the mean of its divisors is an integer number (2987376).

Almost surely, 2^51007620 is an apocalyptic number.

It is an amenable number.

51007620 is an abundant number, since it is smaller than the sum of its proper divisors (92386428).

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

51007620 is a wasteful number, since it uses less digits than its factorization.

51007620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420 (or 3418 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51007620 is about 7141.9619153283. The cubic root of 51007620 is about 370.8614454414.

Adding to 51007620 its reverse (2670015), we get a palindrome (53677635).

It can be divided in two parts, 5100 and 7620, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 51007620 in words is "fifty-one million, seven thousand, six hundred twenty".