52021251 has 16 divisors (see below), whose sum is σ = 78949920. Its totient is φ = 33834240.

The previous prime is 52021247. The next prime is 52021261. The reversal of 52021251 is 15212025.

It is not a de Polignac number, because 52021251 - 2² = 52021247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52021201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22390 + ... + 24603.

It is an arithmetic number, because the mean of its divisors is an integer number (4934370).

Almost surely, 2^52021251 is an apocalyptic number.

52021251 is a deficient number, since it is larger than the sum of its proper divisors (26928669).

52021251 is a wasteful number, since it uses less digits than its factorization.

52021251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47043 (or 47037 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 52021251 is about 7212.5758921484. The cubic root of 52021251 is about 373.3019546508.

Adding to 52021251 its reverse (15212025), we get a palindrome (67233276).

The spelling of 52021251 in words is "fifty-two million, twenty-one thousand, two hundred fifty-one".