51888919 has 2 divisors, whose sum is σ = 51888920. Its totient is φ = 51888918.

The previous prime is 51888877. The next prime is 51888929. The reversal of 51888919 is 91988815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51888919 - 2⁹ = 51888407 is a prime.

It is a super-2 number, since 2×51888919² = 5384919829977122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51888929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25944459 + 25944460.

It is an arithmetic number, because the mean of its divisors is an integer number (25944460).

Almost surely, 2^51888919 is an apocalyptic number.

51888919 is a deficient number, since it is larger than the sum of its proper divisors (1).

51888919 is an equidigital number, since it uses as much as digits as its factorization.

51888919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 49.

The square root of 51888919 is about 7203.3963517219. The cubic root of 51888919 is about 372.9851498806.

The spelling of 51888919 in words is "fifty-one million, eight hundred eighty-eight thousand, nine hundred nineteen".