151821412 has 6 divisors (see below), whose sum is σ = 265687478. Its totient is φ = 75910704.

The previous prime is 151821379. The next prime is 151821427. The reversal of 151821412 is 214128151.

151821412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 151142436 + 678976 = 12294^2 + 824^2 .

It is a super-2 number, since 2×151821412² = 46099482283347488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18977673 + ... + 18977680.

Almost surely, 2^151821412 is an apocalyptic number.

It is an amenable number.

151821412 is a deficient number, since it is larger than the sum of its proper divisors (113866066).

151821412 is a wasteful number, since it uses less digits than its factorization.

151821412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37955357 (or 37955355 counting only the distinct ones).

The product of its digits is 640, while the sum is 25.

The square root of 151821412 is about 12321.5831774979. The cubic root of 151821412 is about 533.4712370823.

Adding to 151821412 its reverse (214128151), we get a palindrome (365949563).

The spelling of 151821412 in words is "one hundred fifty-one million, eight hundred twenty-one thousand, four hundred twelve".