1051323651 has 16 divisors (see below), whose sum is σ = 1780019200. Its totient is φ = 600756264.

The previous prime is 1051323643. The next prime is 1051323659. The reversal of 1051323651 is 1563231501.

1051323651 = 339² + 340² + ... + 1472².

1051323651 is a `hidden beast` number, since 1 + 0 + 5 + 1 + 3 + 2 + 3 + 651 = 666.

It is an interprime number because it is at equal distance from previous prime (1051323643) and next prime (1051323659).

It is not a de Polignac number, because 1051323651 - 2³ = 1051323643 is a prime.

It is a super-2 number, since 2×1051323651² = 2210562838303939602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051323659) 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 15 ways as a sum of consecutive naturals, for example, 2781091 + ... + 2781468.

It is an arithmetic number, because the mean of its divisors is an integer number (111251200).

Almost surely, 2^1051323651 is an apocalyptic number.

1051323651 is a deficient number, since it is larger than the sum of its proper divisors (728695549).

1051323651 is an equidigital number, since it uses as much as digits as its factorization.

1051323651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562575 (or 5562569 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1051323651 is about 32424.1214375964. The cubic root of 1051323651 is about 1016.8232739967.

The spelling of 1051323651 in words is "one billion, fifty-one million, three hundred twenty-three thousand, six hundred fifty-one".