55209736 has 16 divisors (see below), whose sum is σ = 107088300. Its totient is φ = 26652864.

The previous prime is 55209719. The next prime is 55209743. The reversal of 55209736 is 63790255.

It can be written as a sum of positive squares in 2 ways, for example, as 49420900 + 5788836 = 7030^2 + 2406^2 .

It is a super-2 number, since 2×55209736² = 6096229898379392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55209695 and 55209704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118755 + ... + 119218.

Almost surely, 2^55209736 is an apocalyptic number.

It is an amenable number.

55209736 is a deficient number, since it is larger than the sum of its proper divisors (51878564).

55209736 is a wasteful number, since it uses less digits than its factorization.

55209736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238008 (or 238004 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 55209736 is about 7430.3254302890. The cubic root of 55209736 is about 380.7780365660.

It can be divided in two parts, 55209 and 736, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 55209736 in words is "fifty-five million, two hundred nine thousand, seven hundred thirty-six".