51551514 has 96 divisors (see below), whose sum is σ = 138692736. Its totient is φ = 13501440.

The previous prime is 51551509. The next prime is 51551537. The reversal of 51551514 is 41515515.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87529 + ... + 88115.

It is an arithmetic number, because the mean of its divisors is an integer number (1444716).

Almost surely, 2^51551514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51551514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69346368).

51551514 is an abundant number, since it is smaller than the sum of its proper divisors (87141222).

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

51551514 is a wasteful number, since it uses less digits than its factorization.

51551514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 657 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 51551514 is about 7179.9383005706. The cubic root of 51551514 is about 372.1749523927.

The spelling of 51551514 in words is "fifty-one million, five hundred fifty-one thousand, five hundred fourteen".