25305200247 has 32 divisors (see below), whose sum is σ = 37543917312. Its totient is φ = 15089324544.

The previous prime is 25305200209. The next prime is 25305200251. The reversal of 25305200247 is 74200250352.

It is not a de Polignac number, because 25305200247 - 2¹⁶ = 25305134711 is a prime.

It is a super-2 number, since 2×25305200247² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305200647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74793 + ... + 237074.

It is an arithmetic number, because the mean of its divisors is an integer number (1173247416).

Almost surely, 2^25305200247 is an apocalyptic number.

25305200247 is a deficient number, since it is larger than the sum of its proper divisors (12238717065).

25305200247 is a wasteful number, since it uses less digits than its factorization.

25305200247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311967.

The product of its (nonzero) digits is 16800, while the sum is 30.

Adding to 25305200247 its reverse (74200250352), we get a palindrome (99505450599).

The spelling of 25305200247 in words is "twenty-five billion, three hundred five million, two hundred thousand, two hundred forty-seven".