51142551 has 8 divisors (see below), whose sum is σ = 68377344. Its totient is φ = 34001400.

The previous prime is 51142499. The next prime is 51142577. The reversal of 51142551 is 15524115.

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

It is not a de Polignac number, because 51142551 - 2⁷ = 51142423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51142451) 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, 22125 + ... + 24326.

It is an arithmetic number, because the mean of its divisors is an integer number (8547168).

Almost surely, 2^51142551 is an apocalyptic number.

51142551 is a deficient number, since it is larger than the sum of its proper divisors (17234793).

51142551 is a wasteful number, since it uses less digits than its factorization.

51142551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46821.

The product of its digits is 1000, while the sum is 24.

The square root of 51142551 is about 7151.4020303714. The cubic root of 51142551 is about 371.1881720888.

Adding to 51142551 its reverse (15524115), we get a palindrome (66666666).

The spelling of 51142551 in words is "fifty-one million, one hundred forty-two thousand, five hundred fifty-one".