1000551061 has 4 divisors (see below), whose sum is σ = 1000616652. Its totient is φ = 1000485472.

The previous prime is 1000551049. The next prime is 1000551089. The reversal of 1000551061 is 1601550001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 357928561 + 642622500 = 18919^2 + 25350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000551061 - 2¹⁹ = 1000026773 is a prime.

It is a super-2 number, since 2×1000551061² = 2002204851336451442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000551091) 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, 3411 + ... + 44863.

It is an arithmetic number, because the mean of its divisors is an integer number (250154163).

Almost surely, 2^1000551061 is an apocalyptic number.

It is an amenable number.

1000551061 is a deficient number, since it is larger than the sum of its proper divisors (65591).

1000551061 is an equidigital number, since it uses as much as digits as its factorization.

1000551061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65590.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1000551061 is about 31631.4884411088. The cubic root of 1000551061 is about 1000.1836532694.

The spelling of 1000551061 in words is "one billion, five hundred fifty-one thousand, sixty-one".