51442402 has 8 divisors (see below), whose sum is σ = 84178512. Its totient is φ = 23382900.

The previous prime is 51442387. The next prime is 51442427. The reversal of 51442402 is 20424415.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 2338291 = 51442402 / (5 + 1 + 4 + 4 + 2 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169124 + ... + 1169167.

It is an arithmetic number, because the mean of its divisors is an integer number (10522314).

Almost surely, 2^51442402 is an apocalyptic number.

51442402 is a deficient number, since it is larger than the sum of its proper divisors (32736110).

51442402 is a wasteful number, since it uses less digits than its factorization.

51442402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338304.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 51442402 is about 7172.3358817055. The cubic root of 51442402 is about 371.9121897416.

Adding to 51442402 its reverse (20424415), we get a palindrome (71866817).

The spelling of 51442402 in words is "fifty-one million, four hundred forty-two thousand, four hundred two".