51407942 has 8 divisors (see below), whose sum is σ = 78752736. Its totient is φ = 25157032.

The previous prime is 51407929. The next prime is 51407947. The reversal of 51407942 is 24970415.

It is a happy number.

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 = 51407899 and 51407908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51407947) 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, 273353 + ... + 273540.

It is an arithmetic number, because the mean of its divisors is an integer number (9844092).

Almost surely, 2^51407942 is an apocalyptic number.

51407942 is a deficient number, since it is larger than the sum of its proper divisors (27344794).

51407942 is a wasteful number, since it uses less digits than its factorization.

51407942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546942.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51407942 is about 7169.9331935521. The cubic root of 51407942 is about 371.8291262482.

The spelling of 51407942 in words is "fifty-one million, four hundred seven thousand, nine hundred forty-two".