51542947 has 8 divisors (see below), whose sum is σ = 54073440. Its totient is φ = 49062720.

The previous prime is 51542941. The next prime is 51542957. The reversal of 51542947 is 74924515.

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

It is a cyclic number.

It is not a de Polignac number, because 51542947 - 2¹⁹ = 51018659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51542941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10458 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (6759180).

Almost surely, 2^51542947 is an apocalyptic number.

51542947 is a deficient number, since it is larger than the sum of its proper divisors (2530493).

51542947 is a wasteful number, since it uses less digits than its factorization.

51542947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25133.

The product of its digits is 50400, while the sum is 37.

The square root of 51542947 is about 7179.3416829122. The cubic root of 51542947 is about 372.1543348317.

The spelling of 51542947 in words is "fifty-one million, five hundred forty-two thousand, nine hundred forty-seven".