151391385 has 12 divisors (see below), whose sum is σ = 262411812. Its totient is φ = 80742048.

The previous prime is 151391381. The next prime is 151391389. The reversal of 151391385 is 583193151.

151391385 is a `hidden beast` number, since 1 + 513 + 9 + 138 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (151391381) and next prime (151391389).

It can be written as a sum of positive squares in 2 ways, for example, as 100881936 + 50509449 = 10044^2 + 7107^2 .

It is not a de Polignac number, because 151391385 - 2² = 151391381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151391381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1682082 + ... + 1682171.

It is an arithmetic number, because the mean of its divisors is an integer number (21867651).

Almost surely, 2^151391385 is an apocalyptic number.

151391385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

151391385 is a deficient number, since it is larger than the sum of its proper divisors (111020427).

151391385 is a wasteful number, since it uses less digits than its factorization.

151391385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364264 (or 3364261 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 151391385 is about 12304.1206512290. The cubic root of 151391385 is about 532.9670833994.

The spelling of 151391385 in words is "one hundred fifty-one million, three hundred ninety-one thousand, three hundred eighty-five".