51142445 has 4 divisors (see below), whose sum is σ = 61370940. Its totient is φ = 40913952.

The previous prime is 51142423. The next prime is 51142451. The reversal of 51142445 is 54424115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10259209 + 40883236 = 3203^2 + 6394^2 .

It is a cyclic number.

It is not a de Polignac number, because 51142445 - 2¹² = 51138349 is a prime.

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, 5114240 + ... + 5114249.

It is an arithmetic number, because the mean of its divisors is an integer number (15342735).

Almost surely, 2^51142445 is an apocalyptic number.

It is an amenable number.

51142445 is a deficient number, since it is larger than the sum of its proper divisors (10228495).

51142445 is a wasteful number, since it uses less digits than its factorization.

51142445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228494.

The product of its digits is 3200, while the sum is 26.

The square root of 51142445 is about 7151.3946192334. The cubic root of 51142445 is about 371.1879156424.

The spelling of 51142445 in words is "fifty-one million, one hundred forty-two thousand, four hundred forty-five".