1551565242 has 12 divisors (see below), whose sum is σ = 3361724730. Its totient is φ = 517188408.

The previous prime is 1551565241. The next prime is 1551565261. The reversal of 1551565242 is 2425651551.

1551565242 is a `hidden beast` number, since 1 + 5 + 51 + 565 + 2 + 42 = 666.

1551565242 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1166973921 + 384591321 = 34161^2 + 19611^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1551565197 and 1551565206.

It is not an unprimeable number, because it can be changed into a prime (1551565241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43099017 + ... + 43099052.

Almost surely, 2^1551565242 is an apocalyptic number.

1551565242 is an abundant number, since it is smaller than the sum of its proper divisors (1810159488).

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

1551565242 is a wasteful number, since it uses less digits than its factorization.

1551565242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86198077 (or 86198074 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 1551565242 is about 39389.9129473524. The cubic root of 1551565242 is about 1157.6839544864.

The spelling of 1551565242 in words is "one billion, five hundred fifty-one million, five hundred sixty-five thousand, two hundred forty-two".