51435506 has 8 divisors (see below), whose sum is σ = 81691740. Its totient is φ = 24204928.

The previous prime is 51435497. The next prime is 51435509. The reversal of 51435506 is 60553415.

It can be written as a sum of positive squares in 2 ways, for example, as 48177481 + 3258025 = 6941^2 + 1805^2 .

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

It is a super-2 number, since 2×51435506² = 5291222554952072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51435509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756371 + ... + 756438.

Almost surely, 2^51435506 is an apocalyptic number.

51435506 is a deficient number, since it is larger than the sum of its proper divisors (30256234).

51435506 is a wasteful number, since it uses less digits than its factorization.

51435506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512828.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 51435506 is about 7171.8551296021. The cubic root of 51435506 is about 371.8955703707.

The spelling of 51435506 in words is "fifty-one million, four hundred thirty-five thousand, five hundred six".