51490130 has 8 divisors (see below), whose sum is σ = 92682252. Its totient is φ = 20596048.

The previous prime is 51490099. The next prime is 51490139. The reversal of 51490130 is 3109415.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50822641 + 667489 = 7129^2 + 817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51490096 and 51490105.

It is not an unprimeable number, because it can be changed into a prime (51490139) 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, 2574497 + ... + 2574516.

Almost surely, 2^51490130 is an apocalyptic number.

51490130 is a deficient number, since it is larger than the sum of its proper divisors (41192122).

51490130 is a wasteful number, since it uses less digits than its factorization.

51490130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149020.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51490130 is about 7175.6623387671. The cubic root of 51490130 is about 372.0271736037.

Adding to 51490130 its reverse (3109415), we get a palindrome (54599545).

The spelling of 51490130 in words is "fifty-one million, four hundred ninety thousand, one hundred thirty".