1951116251 has 12 divisors (see below), whose sum is σ = 2389123080. Its totient is φ = 1584364320.

The previous prime is 1951116229. The next prime is 1951116287. The reversal of 1951116251 is 1526111591.

It is a happy number.

It is not a de Polignac number, because 1951116251 - 2²² = 1946921947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1951113251) 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 11 ways as a sum of consecutive naturals, for example, 1046930 + ... + 1048791.

It is an arithmetic number, because the mean of its divisors is an integer number (199093590).

Almost surely, 2^1951116251 is an apocalyptic number.

1951116251 is a deficient number, since it is larger than the sum of its proper divisors (438006829).

1951116251 is a wasteful number, since it uses less digits than its factorization.

1951116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095754 (or 2095747 counting only the distinct ones).

The product of its digits is 2700, while the sum is 32.

The square root of 1951116251 is about 44171.4415771095. The cubic root of 1951116251 is about 1249.5713198835.

The spelling of 1951116251 in words is "one billion, nine hundred fifty-one million, one hundred sixteen thousand, two hundred fifty-one".