56167621 has 4 divisors (see below), whose sum is σ = 56539744. Its totient is φ = 55795500.

The previous prime is 56167619. The next prime is 56167627. The reversal of 56167621 is 12676165.

56167621 = T₂₅₄ + T₂₅₅ + ... + T₇₀₆.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12676165 = 5 ⋅2535233.

It is a cyclic number.

It is not a de Polignac number, because 56167621 - 2¹ = 56167619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56167627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185835 + ... + 186136.

It is an arithmetic number, because the mean of its divisors is an integer number (14134936).

Almost surely, 2^56167621 is an apocalyptic number.

It is an amenable number.

56167621 is a deficient number, since it is larger than the sum of its proper divisors (372123).

56167621 is a wasteful number, since it uses less digits than its factorization.

56167621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372122.

The product of its digits is 15120, while the sum is 34.

The square root of 56167621 is about 7494.5060544375. The cubic root of 56167621 is about 382.9675794648.

The spelling of 56167621 in words is "fifty-six million, one hundred sixty-seven thousand, six hundred twenty-one".