1651115001 has 4 divisors (see below), whose sum is σ = 2201486672. Its totient is φ = 1100743332.

The previous prime is 1651114957. The next prime is 1651115003. The reversal of 1651115001 is 1005111561.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1005111561 = 3 ⋅335037187.

It is not a de Polignac number, because 1651115001 - 2⁶ = 1651114937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1651115003) 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, 275185831 + ... + 275185836.

It is an arithmetic number, because the mean of its divisors is an integer number (550371668).

Almost surely, 2^1651115001 is an apocalyptic number.

It is an amenable number.

1651115001 is a deficient number, since it is larger than the sum of its proper divisors (550371671).

1651115001 is an equidigital number, since it uses as much as digits as its factorization.

1651115001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550371670.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 1651115001 is about 40633.9144188694. The cubic root of 1651115001 is about 1181.9318639667.

Adding to 1651115001 its reverse (1005111561), we get a palindrome (2656226562).

The spelling of 1651115001 in words is "one billion, six hundred fifty-one million, one hundred fifteen thousand, one".