24911887225 has 9 divisors (see below), whose sum is σ = 30891718767. Its totient is φ = 19928878440.

The previous prime is 24911887223. The next prime is 24911887267. The reversal of 24911887225 is 52278811942.

It is a happy number.

The square root of 24911887225 is 157835.

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., 8968279401 + 15943607824 = 94701^2 + 126268^2 .

It is not a de Polignac number, because 24911887225 - 2¹ = 24911887223 is a prime.

It is a super-2 number, since 2×24911887225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24911887223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 773392 + ... + 804958.

Almost surely, 2^24911887225 is an apocalyptic number.

24911887225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

24911887225 is the 157835-th square number.

24911887225 is the 78918-th centered octagonal number.

It is an amenable number.

24911887225 is a deficient number, since it is larger than the sum of its proper divisors (5979831542).

24911887225 is an frugal number, since it uses more digits than its factorization.

24911887225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63144 (or 31572 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

Multiplying 24911887225 by its sum of digits (49), we get a square (1220682474025 = 1104845²).

The spelling of 24911887225 in words is "twenty-four billion, nine hundred eleven million, eight hundred eighty-seven thousand, two hundred twenty-five".