1071631651 has 4 divisors (see below), whose sum is σ = 1077618600. Its totient is φ = 1065644704.

The previous prime is 1071631633. The next prime is 1071631679. The reversal of 1071631651 is 1561361701.

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 1071631651 - 2⁷ = 1071631523 is a prime.

It is a super-2 number, since 2×1071631651² = 2296788790849971602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071638651) 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, 2993206 + ... + 2993563.

It is an arithmetic number, because the mean of its divisors is an integer number (269404650).

Almost surely, 2^1071631651 is an apocalyptic number.

1071631651 is a deficient number, since it is larger than the sum of its proper divisors (5986949).

1071631651 is an equidigital number, since it uses as much as digits as its factorization.

1071631651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986948.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1071631651 is about 32735.7854801133. The cubic root of 1071631651 is about 1023.3287541543.

The spelling of 1071631651 in words is "one billion, seventy-one million, six hundred thirty-one thousand, six hundred fifty-one".