51009747 has 16 divisors (see below), whose sum is σ = 69588480. Its totient is φ = 33228000.

The previous prime is 51009731. The next prime is 51009769. The reversal of 51009747 is 74790015.

It is not a de Polignac number, because 51009747 - 2⁴ = 51009731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51009947) 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, 22872 + ... + 25002.

It is an arithmetic number, because the mean of its divisors is an integer number (4349280).

Almost surely, 2^51009747 is an apocalyptic number.

51009747 is a deficient number, since it is larger than the sum of its proper divisors (18578733).

51009747 is a wasteful number, since it uses less digits than its factorization.

51009747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 51009747 is about 7142.1108224390. The cubic root of 51009747 is about 370.8666003008.

The spelling of 51009747 in words is "fifty-one million, nine thousand, seven hundred forty-seven".