51442047 has 10 divisors (see below), whose sum is σ = 76845648. Its totient is φ = 34294644.

The previous prime is 51442043. The next prime is 51442057. The reversal of 51442047 is 74024415.

It is not a de Polignac number, because 51442047 - 2² = 51442043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51442047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51442043) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 317463 + ... + 317624.

Almost surely, 2^51442047 is an apocalyptic number.

51442047 is a deficient number, since it is larger than the sum of its proper divisors (25403601).

51442047 is an equidigital number, since it uses as much as digits as its factorization.

51442047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635099 (or 635090 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 51442047 is about 7172.3111337978. The cubic root of 51442047 is about 371.9113342273.

The spelling of 51442047 in words is "fifty-one million, four hundred forty-two thousand, forty-seven".