60561821 has 4 divisors (see below), whose sum is σ = 60600672. Its totient is φ = 60522972.

The previous prime is 60561811. The next prime is 60561847. The reversal of 60561821 is 12816506.

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: 12816506 = 2 ⋅6408253.

It is a cyclic number.

It is not a de Polignac number, because 60561821 - 2⁶ = 60561757 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 (60561811) 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, 16985 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (15150168).

Almost surely, 2^60561821 is an apocalyptic number.

It is an amenable number.

60561821 is a deficient number, since it is larger than the sum of its proper divisors (38851).

60561821 is a wasteful number, since it uses less digits than its factorization.

60561821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38850.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 60561821 is about 7782.1475827692. The cubic root of 60561821 is about 392.7048893080.

It can be divided in two parts, 605 and 61821, that added together give a palindrome (62426).

The spelling of 60561821 in words is "sixty million, five hundred sixty-one thousand, eight hundred twenty-one".