51252501 has 32 divisors (see below), whose sum is σ = 75091968. Its totient is φ = 30965760.

The previous prime is 51252469. The next prime is 51252527. The reversal of 51252501 is 10525215.

It is not a de Polignac number, because 51252501 - 2⁵ = 51252469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51252401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265461 + ... + 265653.

It is an arithmetic number, because the mean of its divisors is an integer number (2346624).

Almost surely, 2^51252501 is an apocalyptic number.

51252501 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51252501 is a deficient number, since it is larger than the sum of its proper divisors (23839467).

51252501 is a wasteful number, since it uses less digits than its factorization.

51252501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51252501 is about 7159.0852069241. The cubic root of 51252501 is about 371.4539841939.

Adding to 51252501 its reverse (10525215), we get a palindrome (61777716).

It can be divided in two parts, 5125 and 2501, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 51252501 in words is "fifty-one million, two hundred fifty-two thousand, five hundred one".