151138906 has 4 divisors (see below), whose sum is σ = 226708362. Its totient is φ = 75569452.

The previous prime is 151138877. The next prime is 151138909. The reversal of 151138906 is 609831151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 151068681 + 70225 = 12291^2 + 265^2 .

It is not an unprimeable number, because it can be changed into a prime (151138909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37784725 + ... + 37784728.

Almost surely, 2^151138906 is an apocalyptic number.

151138906 is a deficient number, since it is larger than the sum of its proper divisors (75569456).

151138906 is an equidigital number, since it uses as much as digits as its factorization.

151138906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75569455.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 151138906 is about 12293.8564331946. The cubic root of 151138906 is about 532.6706379306.

The spelling of 151138906 in words is "one hundred fifty-one million, one hundred thirty-eight thousand, nine hundred six".