1951395225 has 48 divisors (see below), whose sum is σ = 3480527232. Its totient is φ = 959016960.

The previous prime is 1951395191. The next prime is 1951395241. The reversal of 1951395225 is 5225931591.

It is not a de Polignac number, because 1951395225 - 2⁷ = 1951395097 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 707449 + ... + 710201.

It is an arithmetic number, because the mean of its divisors is an integer number (72510984).

Almost surely, 2^1951395225 is an apocalyptic number.

1951395225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1951395225 is a deficient number, since it is larger than the sum of its proper divisors (1529132007).

1951395225 is a wasteful number, since it uses less digits than its factorization.

1951395225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3501 counting only the distinct ones).

The product of its digits is 121500, while the sum is 42.

The square root of 1951395225 is about 44174.5993190657. The cubic root of 1951395225 is about 1249.6308723399.

The spelling of 1951395225 in words is "one billion, nine hundred fifty-one million, three hundred ninety-five thousand, two hundred twenty-five".