1055551001 has 4 divisors (see below), whose sum is σ = 1056187392. Its totient is φ = 1054914612.

The previous prime is 1055550953. The next prime is 1055551009. The reversal of 1055551001 is 1001555501.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1001555501 = 149 ⋅6721849.

It is a cyclic number.

It is not a de Polignac number, because 1055551001 - 2¹⁰ = 1055549977 is a prime.

It is a super-2 number, since 2×1055551001² = 2228375831424204002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055551009) 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, 315701 + ... + 319026.

It is an arithmetic number, because the mean of its divisors is an integer number (264046848).

Almost surely, 2^1055551001 is an apocalyptic number.

It is an amenable number.

1055551001 is a deficient number, since it is larger than the sum of its proper divisors (636391).

1055551001 is an equidigital number, since it uses as much as digits as its factorization.

1055551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636390.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 1055551001 is about 32489.2443894899. The cubic root of 1055551001 is about 1018.1843262759.

The spelling of 1055551001 in words is "one billion, fifty-five million, five hundred fifty-one thousand, one".