551535725 has 36 divisors (see below), whose sum is σ = 764629632. Its totient is φ = 394056000.

The previous prime is 551535707. The next prime is 551535763. The reversal of 551535725 is 527535155.

551535725 = T₆₆₃₀ + T₆₆₃₁ + ... + T₆₆₅₄.

It is a happy number.

It is not a de Polignac number, because 551535725 - 2¹⁴ = 551519341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 128870 + ... + 133080.

It is an arithmetic number, because the mean of its divisors is an integer number (21239712).

Almost surely, 2^551535725 is an apocalyptic number.

It is an amenable number.

551535725 is a deficient number, since it is larger than the sum of its proper divisors (213093907).

551535725 is a wasteful number, since it uses less digits than its factorization.

551535725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278 (or 4260 counting only the distinct ones).

The product of its digits is 131250, while the sum is 38.

The square root of 551535725 is about 23484.7977423694. The cubic root of 551535725 is about 820.0831390024.

The spelling of 551535725 in words is "five hundred fifty-one million, five hundred thirty-five thousand, seven hundred twenty-five".