151211538 has 24 divisors (see below), whose sum is σ = 344869200. Its totient is φ = 47750904.

The previous prime is 151211537. The next prime is 151211561. The reversal of 151211538 is 835112151.

151211538 is a `hidden beast` number, since 1 + 5 + 121 + 1 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (151211531) 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, 220728 + ... + 221411.

It is an arithmetic number, because the mean of its divisors is an integer number (14369550).

Almost surely, 2^151211538 is an apocalyptic number.

151211538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

151211538 is an abundant number, since it is smaller than the sum of its proper divisors (193657662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151211538 is a wasteful number, since it uses less digits than its factorization.

151211538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442166 (or 442163 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 151211538 is about 12296.8100741615. The cubic root of 151211538 is about 532.7559518072.

Adding to 151211538 its reverse (835112151), we get a palindrome (986323689).

The spelling of 151211538 in words is "one hundred fifty-one million, two hundred eleven thousand, five hundred thirty-eight".