151621320 has 32 divisors (see below), whose sum is σ = 454864320. Its totient is φ = 40432320.

The previous prime is 151621307. The next prime is 151621331. The reversal of 151621320 is 23126151.

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 in 7 ways as a sum of consecutive naturals, for example, 631636 + ... + 631875.

It is an arithmetic number, because the mean of its divisors is an integer number (14214510).

Almost surely, 2^151621320 is an apocalyptic number.

151621320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151621320 is an abundant number, since it is smaller than the sum of its proper divisors (303243000).

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

151621320 is a wasteful number, since it uses less digits than its factorization.

151621320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263525 (or 1263521 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 151621320 is about 12313.4609269693. The cubic root of 151621320 is about 533.2367724491.

Adding to 151621320 its reverse (23126151), we get a palindrome (174747471).

The spelling of 151621320 in words is "one hundred fifty-one million, six hundred twenty-one thousand, three hundred twenty".