51778607 has 2 divisors, whose sum is σ = 51778608. Its totient is φ = 51778606.

The previous prime is 51778567. The next prime is 51778621. The reversal of 51778607 is 70687715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51778607 - 2⁸ = 51778351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51778807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25889303 + 25889304.

It is an arithmetic number, because the mean of its divisors is an integer number (25889304).

Almost surely, 2^51778607 is an apocalyptic number.

51778607 is a deficient number, since it is larger than the sum of its proper divisors (1).

51778607 is an equidigital number, since it uses as much as digits as its factorization.

51778607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 51778607 is about 7195.7353342101. The cubic root of 51778607 is about 372.7206494181.

The spelling of 51778607 in words is "fifty-one million, seven hundred seventy-eight thousand, six hundred seven".