51542525 has 12 divisors (see below), whose sum is σ = 64014132. Its totient is φ = 41168640.

The previous prime is 51542479. The next prime is 51542531. The reversal of 51542525 is 52524515.

It can be written as a sum of positive squares in 6 ways, for example, as 534361 + 51008164 = 731^2 + 7142^2 .

It is not a de Polignac number, because 51542525 - 2⁶ = 51542461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20117 + ... + 22533.

It is an arithmetic number, because the mean of its divisors is an integer number (5334511).

Almost surely, 2^51542525 is an apocalyptic number.

It is an amenable number.

51542525 is a deficient number, since it is larger than the sum of its proper divisors (12471607).

51542525 is a wasteful number, since it uses less digits than its factorization.

51542525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280 (or 3275 counting only the distinct ones).

The product of its digits is 10000, while the sum is 29.

The square root of 51542525 is about 7179.3122929707. The cubic root of 51542525 is about 372.1533191767.

The spelling of 51542525 in words is "fifty-one million, five hundred forty-two thousand, five hundred twenty-five".