51869725 has 24 divisors (see below), whose sum is σ = 66022560. Its totient is φ = 40413120.

The previous prime is 51869711. The next prime is 51869729. The reversal of 51869725 is 52796815.

It is not a de Polignac number, because 51869725 - 2¹¹ = 51867677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51869729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289686 + ... + 289864.

It is an arithmetic number, because the mean of its divisors is an integer number (2750940).

Almost surely, 2^51869725 is an apocalyptic number.

It is an amenable number.

51869725 is a deficient number, since it is larger than the sum of its proper divisors (14152835).

51869725 is a wasteful number, since it uses less digits than its factorization.

51869725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 424 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 51869725 is about 7202.0639402882. The cubic root of 51869725 is about 372.9391544478.

The spelling of 51869725 in words is "fifty-one million, eight hundred sixty-nine thousand, seven hundred twenty-five".