15210420133 has 4 divisors (see below), whose sum is σ = 15381323820. Its totient is φ = 15039516448.

The previous prime is 15210420101. The next prime is 15210420157. The reversal of 15210420133 is 33102401251.

It is a happy number.

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 840884004 + 14369536129 = 28998^2 + 119873^2 .

It is a cyclic number.

It is not a de Polignac number, because 15210420133 - 2⁵ = 15210420101 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 (15210420833) 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, 85451710 + ... + 85451887.

It is an arithmetic number, because the mean of its divisors is an integer number (3845330955).

Almost surely, 2^15210420133 is an apocalyptic number.

It is an amenable number.

15210420133 is a deficient number, since it is larger than the sum of its proper divisors (170903687).

15210420133 is an equidigital number, since it uses as much as digits as its factorization.

15210420133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170903686.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 15210420133 its reverse (33102401251), we get a palindrome (48312821384).

The spelling of 15210420133 in words is "fifteen billion, two hundred ten million, four hundred twenty thousand, one hundred thirty-three".