5151379212225 has 135 divisors (see below), whose sum is σ = 9865939094451. Its totient is φ = 2657142208800.

The previous prime is 5151379212169. The next prime is 5151379212299. The reversal of 5151379212225 is 5222129731515.

The square root of 5151379212225 is 2269665.

It is a perfect power (a square), and thus also a powerful number.

5151379212225 is a `hidden beast` number, since 5 + 1 + 51 + 379 + 2 + 1 + 2 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1854496516401 + 3296882695824 = 1361799^2 + 1815732^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is a de Polignac number, because none of the positive numbers 2^k-5151379212225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 3166181862 + ... + 3166183488.

Almost surely, 2^{5151379212225} is an apocalyptic number.

5151379212225 is the 2269665-th square number.

5151379212225 is the 1134833-rd centered octagonal number.

It is an amenable number.

5151379212225 is a deficient number, since it is larger than the sum of its proper divisors (4714559882226).

5151379212225 is an frugal number, since it uses more digits than its factorization.

5151379212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338 (or 1666 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The spelling of 5151379212225 in words is "five trillion, one hundred fifty-one billion, three hundred seventy-nine million, two hundred twelve thousand, two hundred twenty-five".