2105620951 has 24 divisors (see below), whose sum is σ = 2600792064. Its totient is φ = 1666711200.

The previous prime is 2105620927. The next prime is 2105620963. The reversal of 2105620951 is 1590265012.

It is not a de Polignac number, because 2105620951 - 2²⁵ = 2072066519 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 (2105620921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127626 + ... + 143176.

It is an arithmetic number, because the mean of its divisors is an integer number (108366336).

Almost surely, 2^2105620951 is an apocalyptic number.

2105620951 is a deficient number, since it is larger than the sum of its proper divisors (495171113).

2105620951 is a wasteful number, since it uses less digits than its factorization.

2105620951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15639 (or 15610 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 2105620951 is about 45887.0455684390. The cubic root of 2105620951 is about 1281.7206983282.

Adding to 2105620951 its reverse (1590265012), we get a palindrome (3695885963).

The spelling of 2105620951 in words is "two billion, one hundred five million, six hundred twenty thousand, nine hundred fifty-one".