52400251 has 4 divisors (see below), whose sum is σ = 53816512. Its totient is φ = 50983992.

The previous prime is 52400219. The next prime is 52400267. The reversal of 52400251 is 15200425.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52400251 - 2⁵ = 52400219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52400291) 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, 708075 + ... + 708148.

It is an arithmetic number, because the mean of its divisors is an integer number (13454128).

Almost surely, 2^52400251 is an apocalyptic number.

52400251 is a deficient number, since it is larger than the sum of its proper divisors (1416261).

52400251 is a wasteful number, since it uses less digits than its factorization.

52400251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416260.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 52400251 is about 7238.8017654858. The cubic root of 52400251 is about 374.2063237635.

Adding to 52400251 its reverse (15200425), we get a palindrome (67600676).

The spelling of 52400251 in words is "fifty-two million, four hundred thousand, two hundred fifty-one".