151891830 has 96 divisors (see below), whose sum is σ = 407964960. Its totient is φ = 39191040.

The previous prime is 151891813. The next prime is 151891841. The reversal of 151891830 is 38198151.

It is a super-2 number, since 2×151891830² = 46142256041497800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 400581 + ... + 400959.

It is an arithmetic number, because the mean of its divisors is an integer number (4249635).

Almost surely, 2^151891830 is an apocalyptic number.

151891830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 151891830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203982480).

151891830 is an abundant number, since it is smaller than the sum of its proper divisors (256073130).

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

151891830 is a wasteful number, since it uses less digits than its factorization.

151891830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 151891830 is about 12324.4403524055. The cubic root of 151891830 is about 533.5537027692.

The spelling of 151891830 in words is "one hundred fifty-one million, eight hundred ninety-one thousand, eight hundred thirty".