1551346506 has 72 divisors (see below), whose sum is σ = 3540045600. Its totient is φ = 509180256.

The previous prime is 1551346499. The next prime is 1551346513. The reversal of 1551346506 is 6056431551.

1551346506 is a `hidden beast` number, since 15 + 5 + 134 + 6 + 506 = 666.

It is an interprime number because it is at equal distance from previous prime (1551346499) and next prime (1551346513).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2589595 + ... + 2590193.

It is an arithmetic number, because the mean of its divisors is an integer number (49167300).

Almost surely, 2^1551346506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551346506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770022800).

1551346506 is an abundant number, since it is smaller than the sum of its proper divisors (1988699094).

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

1551346506 is an frugal number, since it uses more digits than its factorization.

1551346506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1551346506 is about 39387.1363010819. The cubic root of 1551346506 is about 1157.6295494140.

The spelling of 1551346506 in words is "one billion, five hundred fifty-one million, three hundred forty-six thousand, five hundred six".