151408821 has 4 divisors (see below), whose sum is σ = 201878432. Its totient is φ = 100939212.

The previous prime is 151408819. The next prime is 151408841. The reversal of 151408821 is 128804151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 151408821 - 2¹ = 151408819 is a prime.

It is a super-2 number, since 2×151408821² = 45849262153220082, 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 (151408801) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 25234801 + ... + 25234806.

It is an arithmetic number, because the mean of its divisors is an integer number (50469608).

Almost surely, 2^151408821 is an apocalyptic number.

It is an amenable number.

151408821 is a deficient number, since it is larger than the sum of its proper divisors (50469611).

151408821 is an equidigital number, since it uses as much as digits as its factorization.

151408821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50469610.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 151408821 is about 12304.8291739463. The cubic root of 151408821 is about 532.9875435185.

The spelling of 151408821 in words is "one hundred fifty-one million, four hundred eight thousand, eight hundred twenty-one".