51442942 has 8 divisors (see below), whose sum is σ = 77197896. Its totient is φ = 25710312.

The previous prime is 51442931. The next prime is 51442943. The reversal of 51442942 is 24924415.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51442943) 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, 2553 + ... + 10459.

It is an arithmetic number, because the mean of its divisors is an integer number (9649737).

Almost surely, 2^51442942 is an apocalyptic number.

51442942 is a deficient number, since it is larger than the sum of its proper divisors (25754954).

51442942 is a wasteful number, since it uses less digits than its factorization.

51442942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11162.

The product of its digits is 11520, while the sum is 31.

The square root of 51442942 is about 7172.3735262464. The cubic root of 51442942 is about 371.9134910797.

The spelling of 51442942 in words is "fifty-one million, four hundred forty-two thousand, nine hundred forty-two".