551685137 has 4 divisors (see below), whose sum is σ = 554115696. Its totient is φ = 549254580.

The previous prime is 551685131. The next prime is 551685151. The reversal of 551685137 is 731586155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551685137 - 2¹⁰ = 551684113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551685094 and 551685103.

It is not an unprimeable number, because it can be changed into a prime (551685131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214939 + ... + 1215392.

It is an arithmetic number, because the mean of its divisors is an integer number (138528924).

Almost surely, 2^551685137 is an apocalyptic number.

It is an amenable number.

551685137 is a deficient number, since it is larger than the sum of its proper divisors (2430559).

551685137 is a wasteful number, since it uses less digits than its factorization.

551685137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430558.

The product of its digits is 126000, while the sum is 41.

The square root of 551685137 is about 23487.9785635120. The cubic root of 551685137 is about 820.1571863056.

The spelling of 551685137 in words is "five hundred fifty-one million, six hundred eighty-five thousand, one hundred thirty-seven".