1551125628 has 72 divisors (see below), whose sum is σ = 4470914448. Its totient is φ = 449192448.

The previous prime is 1551125623. The next prime is 1551125647. The reversal of 1551125628 is 8265211551.

1551125628 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 1 + 25 + 628 = 666.

It is a super-3 number, since 3×1551125628³ (a number of 29 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1551125592 and 1551125601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551125623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89526 + ... + 105437.

It is an arithmetic number, because the mean of its divisors is an integer number (62096034).

Almost surely, 2^1551125628 is an apocalyptic number.

1551125628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1551125628 is an abundant number, since it is smaller than the sum of its proper divisors (2919788820).

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

1551125628 is a wasteful number, since it uses less digits than its factorization.

1551125628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195003 (or 194998 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 1551125628 is about 39384.3322655088. The cubic root of 1551125628 is about 1157.5746063834.

The spelling of 1551125628 in words is "one billion, five hundred fifty-one million, one hundred twenty-five thousand, six hundred twenty-eight".