1902013348225 has 9 divisors (see below), whose sum is σ = 2358505102467. Its totient is φ = 1521605162040.

The previous prime is 1902013348211. The next prime is 1902013348231. The reversal of 1902013348225 is 5228433102091.

The square root of 1902013348225 is 1379135.

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

It can be written as a sum of positive squares in only one way, i.e., 684724805361 + 1217288542864 = 827481^2 + 1103308^2 .

It is not a de Polignac number, because 1902013348225 - 2¹⁹ = 1902012823937 is a prime.

It is a super-2 number, since 2×1902013348225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6757762 + ... + 7033588.

Almost surely, 2^{1902013348225} is an apocalyptic number.

1902013348225 is the 1379135-th square number.

1902013348225 is the 689568-th centered octagonal number.

It is an amenable number.

1902013348225 is a deficient number, since it is larger than the sum of its proper divisors (456491754242).

1902013348225 is an frugal number, since it uses more digits than its factorization.

1902013348225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551664 (or 275832 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 1902013348225 in words is "one trillion, nine hundred two billion, thirteen million, three hundred forty-eight thousand, two hundred twenty-five".