551606031 has 20 divisors (see below), whose sum is σ = 835300752. Its totient is φ = 362695968.

The previous prime is 551606009. The next prime is 551606047. The reversal of 551606031 is 130606155.

It is a happy number.

551606031 is a `hidden beast` number, since 5 + 51 + 6 + 0 + 603 + 1 = 666.

It is not a de Polignac number, because 551606031 - 2⁷ = 551605903 is a prime.

It is a super-2 number, since 2×551606031² = 608538426871145922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 551605986 and 551606004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551606051) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40731 + ... + 52556.

Almost surely, 2^551606031 is an apocalyptic number.

551606031 is a deficient number, since it is larger than the sum of its proper divisors (283694721).

551606031 is an equidigital number, since it uses as much as digits as its factorization.

551606031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93372 (or 93363 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 551606031 is about 23486.2945353242. The cubic root of 551606031 is about 820.1179837174.

The spelling of 551606031 in words is "five hundred fifty-one million, six hundred six thousand, thirty-one".