51552401 has 8 divisors (see below), whose sum is σ = 53545320. Its totient is φ = 49573888.

The previous prime is 51552383. The next prime is 51552419. The reversal of 51552401 is 10425515.

It is a happy number.

It is a Cunningham number, because it is equal to 7180²+1.

It is an interprime number because it is at equal distance from previous prime (51552383) and next prime (51552419).

It can be written as a sum of positive squares in 4 ways, for example, as 27040000 + 24512401 = 5200^2 + 4951^2 .

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 51552401 - 2⁶ = 51552337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51552421) 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, 3995 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (6693165).

Almost surely, 2^51552401 is an apocalyptic number.

It is an amenable number.

51552401 is a deficient number, since it is larger than the sum of its proper divisors (1992919).

51552401 is a wasteful number, since it uses less digits than its factorization.

51552401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51552401 is about 7180.0000696379. Note that the first 4 decimals coincide. The cubic root of 51552401 is about 372.1770869391.

Adding to 51552401 its reverse (10425515), we get a palindrome (61977916).

The spelling of 51552401 in words is "fifty-one million, five hundred fifty-two thousand, four hundred one".