21925043287167 has 16 divisors (see below), whose sum is σ = 31603666002560. Its totient is φ = 13473141819552.

The previous prime is 21925043287127. The next prime is 21925043287201. The reversal of 21925043287167 is 76178234052912.

It is not a de Polignac number, because 21925043287167 - 2¹⁰ = 21925043286143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21925043287127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5197969273 + ... + 5197973490.

It is an arithmetic number, because the mean of its divisors is an integer number (1975229125160).

It is a 1-persistent number, because it is pandigital, but 2⋅21925043287167 = 43850086574334 is not.

Almost surely, 2^{21925043287167} is an apocalyptic number.

21925043287167 is a deficient number, since it is larger than the sum of its proper divisors (9678622715393).

21925043287167 is a wasteful number, since it uses less digits than its factorization.

21925043287167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395942822.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 21925043287167 in words is "twenty-one trillion, nine hundred twenty-five billion, forty-three million, two hundred eighty-seven thousand, one hundred sixty-seven".