25514321531 has 8 divisors (see below), whose sum is σ = 27017203824. Its totient is φ = 24011665920.

The previous prime is 25514321519. The next prime is 25514321563. The reversal of 25514321531 is 13512341552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25514321531 - 2⁶ = 25514321467 is a prime.

It is a super-2 number, since 2×25514321531² (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 (25510321531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211316 + ... + 309326.

It is an arithmetic number, because the mean of its divisors is an integer number (3377150478).

Almost surely, 2^25514321531 is an apocalyptic number.

25514321531 is a deficient number, since it is larger than the sum of its proper divisors (1502882293).

25514321531 is a wasteful number, since it uses less digits than its factorization.

25514321531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113341.

The product of its digits is 18000, while the sum is 32.

The spelling of 25514321531 in words is "twenty-five billion, five hundred fourteen million, three hundred twenty-one thousand, five hundred thirty-one".