151900421 has 4 divisors (see below), whose sum is σ = 159895200. Its totient is φ = 143905644.

The previous prime is 151900417. The next prime is 151900433. The reversal of 151900421 is 124009151.

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 a cyclic number.

It is not a de Polignac number, because 151900421 - 2² = 151900417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151900921) 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, 3997361 + ... + 3997398.

It is an arithmetic number, because the mean of its divisors is an integer number (39973800).

Almost surely, 2^151900421 is an apocalyptic number.

It is an amenable number.

151900421 is a deficient number, since it is larger than the sum of its proper divisors (7994779).

151900421 is an equidigital number, since it uses as much as digits as its factorization.

151900421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994778.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 151900421 is about 12324.7888825732. The cubic root of 151900421 is about 533.5637618432.

Adding to 151900421 its reverse (124009151), we get a palindrome (275909572).

The spelling of 151900421 in words is "one hundred fifty-one million, nine hundred thousand, four hundred twenty-one".