51406497 has 12 divisors (see below), whose sum is σ = 76065444. Its totient is φ = 33434880.

The previous prime is 51406429. The next prime is 51406501. The reversal of 51406497 is 79460415.

51406497 is a `hidden beast` number, since 5 + 1 + 4 + 0 + 649 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21986721 + 29419776 = 4689^2 + 5424^2 .

It is not a de Polignac number, because 51406497 - 2²⁴ = 34629281 is a prime.

It is a super-2 number, since 2×51406497² = 5285255867622018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51406417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69288 + ... + 70025.

It is an arithmetic number, because the mean of its divisors is an integer number (6338787).

Almost surely, 2^51406497 is an apocalyptic number.

It is an amenable number.

51406497 is a deficient number, since it is larger than the sum of its proper divisors (24658947).

51406497 is a wasteful number, since it uses less digits than its factorization.

51406497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139360 (or 139357 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 51406497 is about 7169.8324248200. The cubic root of 51406497 is about 371.8256423629.

The spelling of 51406497 in words is "fifty-one million, four hundred six thousand, four hundred ninety-seven".