1051256553 has 4 divisors (see below), whose sum is σ = 1401675408. Its totient is φ = 700837700.

The previous prime is 1051256527. The next prime is 1051256587. The reversal of 1051256553 is 3556521501.

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.

It is a cyclic number.

It is not a de Polignac number, because 1051256553 - 2¹² = 1051252457 is a prime.

It is a super-2 number, since 2×1051256553² = 2210280680450883618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051258553) 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, 175209423 + ... + 175209428.

It is an arithmetic number, because the mean of its divisors is an integer number (350418852).

Almost surely, 2^1051256553 is an apocalyptic number.

It is an amenable number.

1051256553 is a deficient number, since it is larger than the sum of its proper divisors (350418855).

1051256553 is an equidigital number, since it uses as much as digits as its factorization.

1051256553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350418854.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 1051256553 is about 32423.0867284409. The cubic root of 1051256553 is about 1016.8016415022.

The spelling of 1051256553 in words is "one billion, fifty-one million, two hundred fifty-six thousand, five hundred fifty-three".