51742149 has 8 divisors (see below), whose sum is σ = 72620640. Its totient is φ = 32679216.

The previous prime is 51742147. The next prime is 51742183. The reversal of 51742149 is 94124715.

It is a happy number.

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

It is not a de Polignac number, because 51742149 - 2¹ = 51742147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742147) 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, 453822 + ... + 453935.

It is an arithmetic number, because the mean of its divisors is an integer number (9077580).

Almost surely, 2^51742149 is an apocalyptic number.

It is an amenable number.

51742149 is a deficient number, since it is larger than the sum of its proper divisors (20878491).

51742149 is a wasteful number, since it uses less digits than its factorization.

51742149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907779.

The product of its digits is 10080, while the sum is 33.

The square root of 51742149 is about 7193.2015820495. The cubic root of 51742149 is about 372.6331497035.

The spelling of 51742149 in words is "fifty-one million, seven hundred forty-two thousand, one hundred forty-nine".