2151398661533 has 8 divisors (see below), whose sum is σ = 2347022994240. Its totient is φ = 1955781434880.

The previous prime is 2151398661437. The next prime is 2151398661539. The reversal of 2151398661533 is 3351668931512.

It is a happy number.

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 2151398661533 - 2⁸ = 2151398661277 is a prime.

It is a super-3 number, since 3×2151398661533³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151398661539) 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, 1133348 + ... + 2363741.

It is an arithmetic number, because the mean of its divisors is an integer number (293377874280).

Almost surely, 2^{2151398661533} is an apocalyptic number.

It is an amenable number.

2151398661533 is a deficient number, since it is larger than the sum of its proper divisors (195624332707).

2151398661533 is a wasteful number, since it uses less digits than its factorization.

2151398661533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553027.

The product of its digits is 3499200, while the sum is 53.

The spelling of 2151398661533 in words is "two trillion, one hundred fifty-one billion, three hundred ninety-eight million, six hundred sixty-one thousand, five hundred thirty-three".