51520142 has 8 divisors (see below), whose sum is σ = 78148800. Its totient is φ = 25470544.

The previous prime is 51520129. The next prime is 51520151. The reversal of 51520142 is 24102515.

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

It is a congruent number.

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, 144542 + ... + 144897.

It is an arithmetic number, because the mean of its divisors is an integer number (9768600).

Almost surely, 2^51520142 is an apocalyptic number.

51520142 is a deficient number, since it is larger than the sum of its proper divisors (26628658).

51520142 is a wasteful number, since it uses less digits than its factorization.

51520142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289530.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51520142 is about 7177.7532696520. The cubic root of 51520142 is about 372.0994405989.

Adding to 51520142 its reverse (24102515), we get a palindrome (75622657).

The spelling of 51520142 in words is "fifty-one million, five hundred twenty thousand, one hundred forty-two".