151731394 has 8 divisors (see below), whose sum is σ = 229047228. Its totient is φ = 75382320.

The previous prime is 151731361. The next prime is 151731401. The reversal of 151731394 is 493137151.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141253225 + 10478169 = 11885^2 + 3237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241297 + ... + 241924.

Almost surely, 2^151731394 is an apocalyptic number.

151731394 is a deficient number, since it is larger than the sum of its proper divisors (77315834).

151731394 is a wasteful number, since it uses less digits than its factorization.

151731394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483380.

The product of its digits is 11340, while the sum is 34.

The square root of 151731394 is about 12317.9297773611. The cubic root of 151731394 is about 533.3657809252.

The spelling of 151731394 in words is "one hundred fifty-one million, seven hundred thirty-one thousand, three hundred ninety-four".