1551230420 has 24 divisors (see below), whose sum is σ = 3259267200. Its totient is φ = 620171552.

The previous prime is 1551230407. The next prime is 1551230453. The reversal of 1551230420 is 240321551.

It is a super-4 number, since 4×1551230420⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21761 + ... + 59799.

It is an arithmetic number, because the mean of its divisors is an integer number (135802800).

Almost surely, 2^1551230420 is an apocalyptic number.

1551230420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551230420 is an abundant number, since it is smaller than the sum of its proper divisors (1708036780).

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

1551230420 is a wasteful number, since it uses less digits than its factorization.

1551230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40087 (or 40085 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1551230420 is about 39385.6626197910. The cubic root of 1551230420 is about 1157.6006738672.

Adding to 1551230420 its reverse (240321551), we get a palindrome (1791551971).

The spelling of 1551230420 in words is "one billion, five hundred fifty-one million, two hundred thirty thousand, four hundred twenty".