15851225007 has 12 divisors (see below), whose sum is σ = 22897401384. Its totient is φ = 10566935280.

The previous prime is 15851224997. The next prime is 15851225021. The reversal of 15851225007 is 70052215851.

15851225007 is a `hidden beast` number, since 1 + 585 + 1 + 22 + 50 + 0 + 7 = 666.

It is not a de Polignac number, because 15851225007 - 2⁸ = 15851224751 is a prime.

It is a super-2 number, since 2×15851225007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15851225087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217032 + ... + 280722.

It is an arithmetic number, because the mean of its divisors is an integer number (1908116782).

Almost surely, 2^15851225007 is an apocalyptic number.

15851225007 is a deficient number, since it is larger than the sum of its proper divisors (7046176377).

15851225007 is a wasteful number, since it uses less digits than its factorization.

15851225007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91350 (or 91347 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The spelling of 15851225007 in words is "fifteen billion, eight hundred fifty-one million, two hundred twenty-five thousand, seven".