25152115021 has 4 divisors (see below), whose sum is σ = 27438670944. Its totient is φ = 22865559100.

The previous prime is 25152115007. The next prime is 25152115069. The reversal of 25152115021 is 12051125152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25152115021 - 2¹⁵ = 25152082253 is a prime.

It is a super-2 number, since 2×25152115021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25152115921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143277945 + ... + 1143277966.

It is an arithmetic number, because the mean of its divisors is an integer number (6859667736).

Almost surely, 2^25152115021 is an apocalyptic number.

It is an amenable number.

25152115021 is a deficient number, since it is larger than the sum of its proper divisors (2286555923).

25152115021 is a wasteful number, since it uses less digits than its factorization.

25152115021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286555922.

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 25152115021 in words is "twenty-five billion, one hundred fifty-two million, one hundred fifteen thousand, twenty-one".