1651249151 has 4 divisors (see below), whose sum is σ = 1748381472. Its totient is φ = 1554116832.

The previous prime is 1651249133. The next prime is 1651249153. The reversal of 1651249151 is 1519421561.

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 1651249151 - 2¹⁰ = 1651248127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651249153) 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, 48566135 + ... + 48566168.

It is an arithmetic number, because the mean of its divisors is an integer number (437095368).

Almost surely, 2^1651249151 is an apocalyptic number.

1651249151 is a deficient number, since it is larger than the sum of its proper divisors (97132321).

1651249151 is an equidigital number, since it uses as much as digits as its factorization.

1651249151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97132320.

The product of its digits is 10800, while the sum is 35.

The square root of 1651249151 is about 40635.5651000451. The cubic root of 1651249151 is about 1181.9638730163.

The spelling of 1651249151 in words is "one billion, six hundred fifty-one million, two hundred forty-nine thousand, one hundred fifty-one".