51396767 has 4 divisors (see below), whose sum is σ = 54101880. Its totient is φ = 48691656.

The previous prime is 51396757. The next prime is 51396769. The reversal of 51396767 is 76769315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51396767 - 2⁶ = 51396703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51396769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352528 + ... + 1352565.

It is an arithmetic number, because the mean of its divisors is an integer number (13525470).

Almost surely, 2^51396767 is an apocalyptic number.

51396767 is a deficient number, since it is larger than the sum of its proper divisors (2705113).

51396767 is a wasteful number, since it uses less digits than its factorization.

51396767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705112.

The product of its digits is 238140, while the sum is 44.

The square root of 51396767 is about 7169.1538552328. The cubic root of 51396767 is about 371.8021816981.

The spelling of 51396767 in words is "fifty-one million, three hundred ninety-six thousand, seven hundred sixty-seven".