7021572157 has 8 divisors (see below), whose sum is σ = 7060619520. Its totient is φ = 6982605840.

The previous prime is 7021572149. The next prime is 7021572161. The reversal of 7021572157 is 7512751207.

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 7021572157 - 2³ = 7021572149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021572197) 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, 157807 + ... + 197347.

It is an arithmetic number, because the mean of its divisors is an integer number (882577440).

Almost surely, 2^7021572157 is an apocalyptic number.

It is an amenable number.

7021572157 is a deficient number, since it is larger than the sum of its proper divisors (39047363).

7021572157 is a wasteful number, since it uses less digits than its factorization.

7021572157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40523.

The product of its (nonzero) digits is 34300, while the sum is 37.

The square root of 7021572157 is about 83794.8217791529. The cubic root of 7021572157 is about 1914.8942177182.

The spelling of 7021572157 in words is "seven billion, twenty-one million, five hundred seventy-two thousand, one hundred fifty-seven".