1954655251 has 4 divisors (see below), whose sum is σ = 1960192872. Its totient is φ = 1949117632.

The previous prime is 1954655239. The next prime is 1954655363. The reversal of 1954655251 is 1525564591.

It is a happy number.

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 1954655251 - 2⁹ = 1954654739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1954655198 and 1954655207.

It is not an unprimeable number, because it can be changed into a prime (1954655201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768281 + ... + 2768986.

It is an arithmetic number, because the mean of its divisors is an integer number (490048218).

Almost surely, 2^1954655251 is an apocalyptic number.

1954655251 is a deficient number, since it is larger than the sum of its proper divisors (5537621).

1954655251 is an equidigital number, since it uses as much as digits as its factorization.

1954655251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537620.

The product of its digits is 270000, while the sum is 43.

The square root of 1954655251 is about 44211.4832481336. The cubic root of 1954655251 is about 1250.3263683262.

The spelling of 1954655251 in words is "one billion, nine hundred fifty-four million, six hundred fifty-five thousand, two hundred fifty-one".