151668225 has 54 divisors (see below), whose sum is σ = 279136338. Its totient is φ = 78720000.

The previous prime is 151668211. The next prime is 151668247. The reversal of 151668225 is 522866151.

It can be written as a sum of positive squares in 9 ways, for example, as 71368704 + 80299521 = 8448^2 + 8961^2 .

It is not a de Polignac number, because 151668225 - 2⁶ = 151668161 is a prime.

Its product of digits (28800) is a multiple of the sum of its prime divisors (450).

It is a self number, because there is not a number n which added to its sum of digits gives 151668225.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 378025 + ... + 378425.

Almost surely, 2^151668225 is an apocalyptic number.

151668225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

151668225 is a deficient number, since it is larger than the sum of its proper divisors (127468113).

151668225 is a wasteful number, since it uses less digits than its factorization.

151668225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 450 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 151668225 is about 12315.3654026180. The cubic root of 151668225 is about 533.2917534859.

The spelling of 151668225 in words is "one hundred fifty-one million, six hundred sixty-eight thousand, two hundred twenty-five".