51406242 has 32 divisors (see below), whose sum is σ = 109790208. Its totient is φ = 16007376.

The previous prime is 51406213. The next prime is 51406279. The reversal of 51406242 is 24260415.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1603 + ... + 10265.

It is an arithmetic number, because the mean of its divisors is an integer number (3430944).

Almost surely, 2^51406242 is an apocalyptic number.

51406242 is an abundant number, since it is smaller than the sum of its proper divisors (58383966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51406242 is a wasteful number, since it uses less digits than its factorization.

51406242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 51406242 is about 7169.8146419555. The cubic root of 51406242 is about 371.8250275528.

Adding to 51406242 its reverse (24260415), we get a palindrome (75666657).

The spelling of 51406242 in words is "fifty-one million, four hundred six thousand, two hundred forty-two".