1552355220 has 192 divisors, whose sum is σ = 4803724800. Its totient is φ = 372252672.

The previous prime is 1552355201. The next prime is 1552355237. The reversal of 1552355220 is 225532551.

It is a super-2 number, since 2×1552355220² = 4819613458122496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7800681 + ... + 7800879.

It is an arithmetic number, because the mean of its divisors is an integer number (25019400).

Almost surely, 2^1552355220 is an apocalyptic number.

1552355220 is a gapful number since it is divisible by the number (10) 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 1552355220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2401862400).

1552355220 is an abundant number, since it is smaller than the sum of its proper divisors (3251369580).

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

1552355220 is a wasteful number, since it uses less digits than its factorization.

1552355220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1552355220 is about 39399.9393400548. The cubic root of 1552355220 is about 1157.8803990533.

Adding to 1552355220 its reverse (225532551), we get a palindrome (1777887771).

The spelling of 1552355220 in words is "one billion, five hundred fifty-two million, three hundred fifty-five thousand, two hundred twenty".