51478837 has 2 divisors, whose sum is σ = 51478838. Its totient is φ = 51478836.

The previous prime is 51478781. The next prime is 51478859. The reversal of 51478837 is 73887415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 198916 = 7161^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 51478837 - 2¹⁵ = 51446069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51478793 and 51478802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51478237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25739418 + 25739419.

It is an arithmetic number, because the mean of its divisors is an integer number (25739419).

Almost surely, 2^51478837 is an apocalyptic number.

It is an amenable number.

51478837 is a deficient number, since it is larger than the sum of its proper divisors (1).

51478837 is an equidigital number, since it uses as much as digits as its factorization.

51478837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The square root of 51478837 is about 7174.8753996150. The cubic root of 51478837 is about 371.9999735037. Note that the first 4 decimals are identical.

The spelling of 51478837 in words is "fifty-one million, four hundred seventy-eight thousand, eight hundred thirty-seven".