551000061 has 12 divisors (see below), whose sum is σ = 804095292. Its totient is φ = 363545856.

The previous prime is 551000053. The next prime is 551000069. The reversal of 551000061 is 160000155.

It is an interprime number because it is at equal distance from previous prime (551000053) and next prime (551000069).

It can be written as a sum of positive squares in 2 ways, for example, as 418979961 + 132020100 = 20469^2 + 11490^2 .

It is not a de Polignac number, because 551000061 - 2³ = 551000053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550999998 and 551000043.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551000069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314706 + ... + 316451.

It is an arithmetic number, because the mean of its divisors is an integer number (67007941).

Almost surely, 2^551000061 is an apocalyptic number.

It is an amenable number.

551000061 is a deficient number, since it is larger than the sum of its proper divisors (253095231).

551000061 is a wasteful number, since it uses less digits than its factorization.

551000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631260 (or 631257 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 551000061 is about 23473.3904879547. The cubic root of 551000061 is about 819.8175585590.

The spelling of 551000061 in words is "five hundred fifty-one million, sixty-one", and thus it is an aban number.