153417247021 has 4 divisors (see below), whose sum is σ = 153503583772. Its totient is φ = 153330910272.

The previous prime is 153417246971. The next prime is 153417247079. The reversal of 153417247021 is 120742714351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39790275625 + 113626971396 = 199475^2 + 337086^2 .

It is a cyclic number.

It is not a de Polignac number, because 153417247021 - 2¹³ = 153417238829 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 (153417247121) 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, 43165710 + ... + 43169263.

It is an arithmetic number, because the mean of its divisors is an integer number (38375895943).

Almost surely, 2^153417247021 is an apocalyptic number.

It is an amenable number.

153417247021 is a deficient number, since it is larger than the sum of its proper divisors (86336751).

153417247021 is an equidigital number, since it uses as much as digits as its factorization.

153417247021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86336750.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 153417247021 in words is "one hundred fifty-three billion, four hundred seventeen million, two hundred forty-seven thousand, twenty-one".