1551064020 has 96 divisors (see below), whose sum is σ = 5016525696. Its totient is φ = 353894400.

The previous prime is 1551064001. The next prime is 1551064057. The reversal of 1551064020 is 204601551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57901 + ... + 80340.

It is an arithmetic number, because the mean of its divisors is an integer number (52255476).

Almost surely, 2^1551064020 is an apocalyptic number.

1551064020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551064020 is an abundant number, since it is smaller than the sum of its proper divisors (3465461676).

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

1551064020 is a wasteful number, since it uses less digits than its factorization.

1551064020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138281 (or 138279 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1551064020 is about 39383.5501193074. The cubic root of 1551064020 is about 1157.5592805668.

Adding to 1551064020 its reverse (204601551), we get a palindrome (1755665571).

The spelling of 1551064020 in words is "one billion, five hundred fifty-one million, sixty-four thousand, twenty".