55772045 has 24 divisors (see below), whose sum is σ = 78267384. Its totient is φ = 38040576.

The previous prime is 55772027. The next prime is 55772063. The reversal of 55772045 is 54027755.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55772027) and next prime (55772063).

It can be written as a sum of positive squares in 4 ways, for example, as 9572836 + 46199209 = 3094^2 + 6797^2 .

It is not a de Polignac number, because 55772045 - 2⁶ = 55771981 is a prime.

It is a super-2 number, since 2×55772045² = 6221042006964050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55771996 and 55772014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56597 + ... + 57573.

It is an arithmetic number, because the mean of its divisors is an integer number (3261141).

Almost surely, 2^55772045 is an apocalyptic number.

It is an amenable number.

55772045 is a deficient number, since it is larger than the sum of its proper divisors (22495339).

55772045 is a wasteful number, since it uses less digits than its factorization.

55772045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 55772045 is about 7468.0683580160. The cubic root of 55772045 is about 382.0664088742.

The spelling of 55772045 in words is "fifty-five million, seven hundred seventy-two thousand, forty-five".