51845401 has 4 divisors (see below), whose sum is σ = 53051152. Its totient is φ = 50639652.

The previous prime is 51845389. The next prime is 51845413. The reversal of 51845401 is 10454815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (51845389) and next prime (51845413).

It is a cyclic number.

It is not a de Polignac number, because 51845401 - 2⁷ = 51845273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51845401.

It is not an unprimeable number, because it can be changed into a prime (51845441) 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, 602811 + ... + 602896.

It is an arithmetic number, because the mean of its divisors is an integer number (13262788).

Almost surely, 2^51845401 is an apocalyptic number.

It is an amenable number.

51845401 is a deficient number, since it is larger than the sum of its proper divisors (1205751).

51845401 is a wasteful number, since it uses less digits than its factorization.

51845401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205750.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 51845401 is about 7200.3750596757. The cubic root of 51845401 is about 372.8808494644.

It can be divided in two parts, 5184 and 5401, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 51845401 in words is "fifty-one million, eight hundred forty-five thousand, four hundred one".