151971397 has 16 divisors (see below), whose sum is σ = 160300800. Its totient is φ = 143881920.

The previous prime is 151971389. The next prime is 151971403. The reversal of 151971397 is 793179151.

It is a cyclic number.

It is not a de Polignac number, because 151971397 - 2³ = 151971389 is a prime.

It is a super-2 number, since 2×151971397² = 46190611012263218, 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 (151971697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413908 + ... + 414274.

It is an arithmetic number, because the mean of its divisors is an integer number (10018800).

Almost surely, 2^151971397 is an apocalyptic number.

It is an amenable number.

151971397 is a deficient number, since it is larger than the sum of its proper divisors (8329403).

151971397 is a wasteful number, since it uses less digits than its factorization.

151971397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its digits is 59535, while the sum is 43.

The square root of 151971397 is about 12327.6679465339. The cubic root of 151971397 is about 533.6468520776.

The spelling of 151971397 in words is "one hundred fifty-one million, nine hundred seventy-one thousand, three hundred ninety-seven".