1551966025 has 9 divisors (see below), whose sum is σ = 1924682151. Its totient is φ = 1241415240.

The previous prime is 1551966011. The next prime is 1551966043. The reversal of 1551966025 is 5206691551.

The square root of 1551966025 is 39395.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 558707769 + 993258256 = 23637^2 + 31516^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1551966025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 193036 + ... + 200914.

Almost surely, 2^1551966025 is an apocalyptic number.

1551966025 is the 39395-th square number.

1551966025 is the 19698-th centered octagonal number.

It is an amenable number.

1551966025 is a deficient number, since it is larger than the sum of its proper divisors (372716126).

1551966025 is an frugal number, since it uses more digits than its factorization.

1551966025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15768 (or 7884 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

The cubic root of 1551966025 is about 1157.7836259003.

The spelling of 1551966025 in words is "one billion, five hundred fifty-one million, nine hundred sixty-six thousand, twenty-five".