1551161156 has 6 divisors (see below), whose sum is σ = 2714532030. Its totient is φ = 775580576.

The previous prime is 1551161119. The next prime is 1551161173. The reversal of 1551161156 is 6511611551.

It can be written as a sum of positive squares in only one way, i.e., 1052353600 + 498807556 = 32440^2 + 22334^2 .

It is a super-2 number, since 2×1551161156² = 4812201863766512672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193895141 + ... + 193895148.

It is an arithmetic number, because the mean of its divisors is an integer number (452422005).

Almost surely, 2^1551161156 is an apocalyptic number.

It is an amenable number.

1551161156 is a deficient number, since it is larger than the sum of its proper divisors (1163370874).

1551161156 is a wasteful number, since it uses less digits than its factorization.

1551161156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387790293 (or 387790291 counting only the distinct ones).

The product of its digits is 4500, while the sum is 32.

The square root of 1551161156 is about 39384.7833052310. The cubic root of 1551161156 is about 1157.5834442656.

It can be divided in two parts, 15511 and 61156, that added together give a palindrome (76667).

The spelling of 1551161156 in words is "one billion, five hundred fifty-one million, one hundred sixty-one thousand, one hundred fifty-six".