2491701951 has 32 divisors (see below), whose sum is σ = 3612204288. Its totient is φ = 1521676800.

The previous prime is 2491701931. The next prime is 2491701977. The reversal of 2491701951 is 1591071942.

2491701951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2491701951 is a prime.

It is a super-2 number, since 2×2491701951² = 12417157225234412802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491701931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 671401 + ... + 675101.

It is an arithmetic number, because the mean of its divisors is an integer number (112881384).

Almost surely, 2^2491701951 is an apocalyptic number.

2491701951 is a deficient number, since it is larger than the sum of its proper divisors (1120502337).

2491701951 is a wasteful number, since it uses less digits than its factorization.

2491701951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 2491701951 is about 49916.9505378684. The cubic root of 2491701951 is about 1355.7055191270.

The spelling of 2491701951 in words is "two billion, four hundred ninety-one million, seven hundred one thousand, nine hundred fifty-one".