51576401 has 4 divisors (see below), whose sum is σ = 52834404. Its totient is φ = 50318400.

The previous prime is 51576391. The next prime is 51576407. The reversal of 51576401 is 10467515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10467515 = 5 ⋅2093503.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 30195025 = 4624^2 + 5495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51576401 is a prime.

It is a super-2 number, since 2×51576401² = 5320250280225602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51576407) 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, 628940 + ... + 629021.

It is an arithmetic number, because the mean of its divisors is an integer number (13208601).

Almost surely, 2^51576401 is an apocalyptic number.

It is an amenable number.

51576401 is a deficient number, since it is larger than the sum of its proper divisors (1258003).

51576401 is a wasteful number, since it uses less digits than its factorization.

51576401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258002.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51576401 is about 7181.6711843414. The cubic root of 51576401 is about 372.2348331297.

The spelling of 51576401 in words is "fifty-one million, five hundred seventy-six thousand, four hundred one".