1051355551 has 4 divisors (see below), whose sum is σ = 1058919400. Its totient is φ = 1043791704.

The previous prime is 1051355477. The next prime is 1051355573. The reversal of 1051355551 is 1555531501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1051355551 - 2¹⁹ = 1050831263 is a prime.

It is a super-2 number, since 2×1051355551² = 2210696989237027202, 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 (1051355581) 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 3 ways as a sum of consecutive naturals, for example, 3781716 + ... + 3781993.

It is an arithmetic number, because the mean of its divisors is an integer number (264729850).

Almost surely, 2^1051355551 is an apocalyptic number.

1051355551 is a deficient number, since it is larger than the sum of its proper divisors (7563849).

1051355551 is an equidigital number, since it uses as much as digits as its factorization.

1051355551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7563848.

The product of its (nonzero) digits is 9375, while the sum is 31.

The square root of 1051355551 is about 32424.6133515883. The cubic root of 1051355551 is about 1016.8335582812.

The spelling of 1051355551 in words is "one billion, fifty-one million, three hundred fifty-five thousand, five hundred fifty-one".