51530642 has 8 divisors (see below), whose sum is σ = 77590656. Its totient is φ = 25667092.

The previous prime is 51530629. The next prime is 51530653. The reversal of 51530642 is 24603515.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48458 + ... + 49509.

It is an arithmetic number, because the mean of its divisors is an integer number (9698832).

Almost surely, 2^51530642 is an apocalyptic number.

51530642 is a deficient number, since it is larger than the sum of its proper divisors (26060014).

51530642 is a wasteful number, since it uses less digits than its factorization.

51530642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98232.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 51530642 is about 7178.4846590349. The cubic root of 51530642 is about 372.1247173068.

The spelling of 51530642 in words is "fifty-one million, five hundred thirty thousand, six hundred forty-two".