151138081 has 8 divisors (see below), whose sum is σ = 155425320. Its totient is φ = 146861568.

The previous prime is 151138079. The next prime is 151138087. The reversal of 151138081 is 180831151.

It can be written as a sum of positive squares in 4 ways, for example, as 12110400 + 139027681 = 3480^2 + 11791^2 .

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 151138081 - 2¹ = 151138079 is a prime.

It is a super-2 number, since 2×151138081² = 45685439056725122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151138087) 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, 32175 + ... + 36571.

It is an arithmetic number, because the mean of its divisors is an integer number (19428165).

Almost surely, 2^151138081 is an apocalyptic number.

It is an amenable number.

151138081 is a deficient number, since it is larger than the sum of its proper divisors (4287239).

151138081 is an equidigital number, since it uses as much as digits as its factorization.

151138081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363.

The product of its (nonzero) digits is 960, while the sum is 28.

The square root of 151138081 is about 12293.8228798043. The cubic root of 151138081 is about 532.6696687249.

The spelling of 151138081 in words is "one hundred fifty-one million, one hundred thirty-eight thousand, eighty-one".