51402443 has 8 divisors (see below), whose sum is σ = 53359680. Its totient is φ = 49481280.

The previous prime is 51402437. The next prime is 51402469. The reversal of 51402443 is 34420415.

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 51402443 - 2⁸ = 51402187 is a prime.

It is a super-2 number, since 2×51402443² = 5284422292736498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402473) 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, 6098 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (6669960).

Almost surely, 2^51402443 is an apocalyptic number.

51402443 is a deficient number, since it is larger than the sum of its proper divisors (1957237).

51402443 is a wasteful number, since it uses less digits than its factorization.

51402443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18037.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 51402443 is about 7169.5497069202. The cubic root of 51402443 is about 371.8158678476.

Adding to 51402443 its reverse (34420415), we get a palindrome (85822858).

The spelling of 51402443 in words is "fifty-one million, four hundred two thousand, four hundred forty-three".