1051231647 has 4 divisors (see below), whose sum is σ = 1401642200. Its totient is φ = 700821096.

The previous prime is 1051231613. The next prime is 1051231661. The reversal of 1051231647 is 7461321501.

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

It is not a de Polignac number, because 1051231647 - 2¹⁵ = 1051198879 is a prime.

It is a super-2 number, since 2×1051231647² = 2210175951308665218, 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 (1051231147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175205272 + ... + 175205277.

It is an arithmetic number, because the mean of its divisors is an integer number (350410550).

Almost surely, 2^1051231647 is an apocalyptic number.

1051231647 is a deficient number, since it is larger than the sum of its proper divisors (350410553).

1051231647 is an equidigital number, since it uses as much as digits as its factorization.

1051231647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350410552.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1051231647 is about 32422.7026479903. The cubic root of 1051231647 is about 1016.7936115366.

The spelling of 1051231647 in words is "one billion, fifty-one million, two hundred thirty-one thousand, six hundred forty-seven".