1000557811 has 8 divisors (see below), whose sum is σ = 1121018544. Its totient is φ = 885013920.

The previous prime is 1000557793. The next prime is 1000557839. The reversal of 1000557811 is 1187550001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000557811 is a prime.

It is a super-2 number, since 2×1000557811² = 2002231866306223442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000557811.

It is not an unprimeable number, because it can be changed into a prime (1000557851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228780 + ... + 1229593.

It is an arithmetic number, because the mean of its divisors is an integer number (140127318).

Almost surely, 2^1000557811 is an apocalyptic number.

1000557811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000557811 is a deficient number, since it is larger than the sum of its proper divisors (120460733).

1000557811 is a wasteful number, since it uses less digits than its factorization.

1000557811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458421.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 1000557811 is about 31631.5951384055. The cubic root of 1000557811 is about 1000.1859024381.

The spelling of 1000557811 in words is "one billion, five hundred fifty-seven thousand, eight hundred eleven".