51135445 has 8 divisors (see below), whose sum is σ = 61405344. Its totient is φ = 40879824.

The previous prime is 51135437. The next prime is 51135449. The reversal of 51135445 is 54453115.

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

It is a cyclic number.

It is not a de Polignac number, because 51135445 - 2³ = 51135437 is a prime.

It is a super-2 number, since 2×51135445² = 5229667470696050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51135449) 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, 7362 + ... + 12508.

It is an arithmetic number, because the mean of its divisors is an integer number (7675668).

Almost surely, 2^51135445 is an apocalyptic number.

It is an amenable number.

51135445 is a deficient number, since it is larger than the sum of its proper divisors (10269899).

51135445 is a wasteful number, since it uses less digits than its factorization.

51135445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139.

The product of its digits is 6000, while the sum is 28.

The square root of 51135445 is about 7150.9051874570. The cubic root of 51135445 is about 371.1709797165.

The spelling of 51135445 in words is "fifty-one million, one hundred thirty-five thousand, four hundred forty-five".