1623723225 has 48 divisors (see below), whose sum is σ = 2736015360. Its totient is φ = 849499200.

The previous prime is 1623723221. The next prime is 1623723259. The reversal of 1623723225 is 5223273261.

It is not a de Polignac number, because 1623723225 - 2² = 1623723221 is a prime.

It is a super-2 number, since 2×1623723225² = 5272954222808801250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1623723221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1562256 + ... + 1563294.

It is an arithmetic number, because the mean of its divisors is an integer number (57000320).

Almost surely, 2^1623723225 is an apocalyptic number.

1623723225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1623723225 is a deficient number, since it is larger than the sum of its proper divisors (1112292135).

1623723225 is a wasteful number, since it uses less digits than its factorization.

1623723225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1425 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 1623723225 is about 40295.4491847405. The cubic root of 1623723225 is about 1175.3593528908.

Adding to 1623723225 its reverse (5223273261), we get a palindrome (6846996486).

The spelling of 1623723225 in words is "one billion, six hundred twenty-three million, seven hundred twenty-three thousand, two hundred twenty-five".