155563192225 has 81 divisors (see below), whose sum is σ = 229461017331. Its totient is φ = 104314879200.

The previous prime is 155563192223. The next prime is 155563192231. The reversal of 155563192225 is 522291365551.

The square root of 155563192225 is 394415.

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., 56002749201 + 99560443024 = 236649^2 + 315532^2 .

It is not a de Polignac number, because 155563192225 - 2¹ = 155563192223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155563192223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 814466880 + ... + 814467070.

Almost surely, 2^155563192225 is an apocalyptic number.

155563192225 is the 394415-th square number.

155563192225 is the 197208-th centered octagonal number.

It is an amenable number.

155563192225 is a deficient number, since it is larger than the sum of its proper divisors (73897825106).

155563192225 is an frugal number, since it uses more digits than its factorization.

155563192225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 262 counting only the distinct ones).

The product of its digits is 810000, while the sum is 46.

The spelling of 155563192225 in words is "one hundred fifty-five billion, five hundred sixty-three million, one hundred ninety-two thousand, two hundred twenty-five".