1551396132 has 384 divisors, whose sum is σ = 5283532800. Its totient is φ = 385689600.

The previous prime is 1551396131. The next prime is 1551396181. The reversal of 1551396132 is 2316931551.

It is a happy number.

1551396132 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 39 + 613 + 2 = 666.

It is a super-2 number, since 2×1551396132² = 4813659916769122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1551396131) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4988257 + ... + 4988567.

It is an arithmetic number, because the mean of its divisors is an integer number (13759200).

Almost surely, 2^1551396132 is an apocalyptic number.

1551396132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551396132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2641766400).

1551396132 is an abundant number, since it is smaller than the sum of its proper divisors (3732136668).

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

1551396132 is a wasteful number, since it uses less digits than its factorization.

1551396132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 376 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 1551396132 is about 39387.7662732986. The cubic root of 1551396132 is about 1157.6418930805.

The spelling of 1551396132 in words is "one billion, five hundred fifty-one million, three hundred ninety-six thousand, one hundred thirty-two".