51490027 has 4 divisors (see below), whose sum is σ = 51511720. Its totient is φ = 51468336.

The previous prime is 51490013. The next prime is 51490037. The reversal of 51490027 is 72009415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72009415 = 5 ⋅14401883.

It is a cyclic number.

It is not a de Polignac number, because 51490027 - 2⁷ = 51489899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51489977 and 51490004.

It is not an unprimeable number, because it can be changed into a prime (51490007) 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, 6777 + ... + 12202.

It is an arithmetic number, because the mean of its divisors is an integer number (12877930).

Almost surely, 2^51490027 is an apocalyptic number.

51490027 is a deficient number, since it is larger than the sum of its proper divisors (21693).

51490027 is a wasteful number, since it uses less digits than its factorization.

51490027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21692.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 51490027 is about 7175.6551617257. The cubic root of 51490027 is about 372.0269255379.

The spelling of 51490027 in words is "fifty-one million, four hundred ninety thousand, twenty-seven".