1551501156 has 48 divisors (see below), whose sum is σ = 3800853504. Its totient is φ = 491632416.

The previous prime is 1551501143. The next prime is 1551501173. The reversal of 1551501156 is 6511051551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27745 + ... + 62231.

It is an arithmetic number, because the mean of its divisors is an integer number (79184448).

Almost surely, 2^1551501156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551501156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1900426752).

1551501156 is an abundant number, since it is smaller than the sum of its proper divisors (2249352348).

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

1551501156 is a wasteful number, since it uses less digits than its factorization.

1551501156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34680 (or 34678 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 30.

The square root of 1551501156 is about 39389.0994565755. The cubic root of 1551501156 is about 1157.6680152372.

The spelling of 1551501156 in words is "one billion, five hundred fifty-one million, five hundred one thousand, one hundred fifty-six".