51978059 has 4 divisors (see below), whose sum is σ = 59403504. Its totient is φ = 44552616.

The previous prime is 51977983. The next prime is 51978127. The reversal of 51978059 is 95087915.

It is a happy number.

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 51978059 - 2⁸ = 51977803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51978359) 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, 3712712 + ... + 3712725.

It is an arithmetic number, because the mean of its divisors is an integer number (14850876).

Almost surely, 2^51978059 is an apocalyptic number.

51978059 is a deficient number, since it is larger than the sum of its proper divisors (7425445).

51978059 is an equidigital number, since it uses as much as digits as its factorization.

51978059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7425444.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 51978059 is about 7209.5810557896. The cubic root of 51978059 is about 373.1986114841.

The spelling of 51978059 in words is "fifty-one million, nine hundred seventy-eight thousand, fifty-nine".