642151133 has 8 divisors (see below), whose sum is σ = 692232576. Its totient is φ = 592167600.

The previous prime is 642151091. The next prime is 642151171. The reversal of 642151133 is 331151246.

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 642151133 - 2¹⁰ = 642150109 is a prime.

It is a super-2 number, since 2×642151133² = 824716155226367378, which contains 22 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 (642151033) 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, 10553 + ... + 37358.

It is an arithmetic number, because the mean of its divisors is an integer number (86529072).

Almost surely, 2^642151133 is an apocalyptic number.

It is an amenable number.

642151133 is a deficient number, since it is larger than the sum of its proper divisors (50081443).

642151133 is a wasteful number, since it uses less digits than its factorization.

642151133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48955.

The product of its digits is 2160, while the sum is 26.

The square root of 642151133 is about 25340.7011150047. The cubic root of 642151133 is about 862.7383120232.

The spelling of 642151133 in words is "six hundred forty-two million, one hundred fifty-one thousand, one hundred thirty-three".