51379647 has 16 divisors (see below), whose sum is σ = 75790080. Its totient is φ = 30699200.

The previous prime is 51379621. The next prime is 51379649. The reversal of 51379647 is 74697315.

It is a cyclic number.

It is not a de Polignac number, because 51379647 - 2¹⁰ = 51378623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51379599 and 51379608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51379649) 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, 8622 + ... + 13307.

It is an arithmetic number, because the mean of its divisors is an integer number (4736880).

Almost surely, 2^51379647 is an apocalyptic number.

51379647 is a deficient number, since it is larger than the sum of its proper divisors (24410433).

51379647 is a wasteful number, since it uses less digits than its factorization.

51379647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014.

The product of its digits is 158760, while the sum is 42.

The square root of 51379647 is about 7167.9597515611. The cubic root of 51379647 is about 371.7608953125.

The spelling of 51379647 in words is "fifty-one million, three hundred seventy-nine thousand, six hundred forty-seven".