61224981 has 8 divisors (see below), whose sum is σ = 82090080. Its totient is φ = 40588272.

The previous prime is 61224979. The next prime is 61224983. The reversal of 61224981 is 18942216.

It is an interprime number because it is at equal distance from previous prime (61224979) and next prime (61224983).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61224981 - 2¹ = 61224979 is a prime.

It is a super-2 number, since 2×61224981² = 7496996596900722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61224983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56470 + ... + 57543.

It is an arithmetic number, because the mean of its divisors is an integer number (10261260).

Almost surely, 2^61224981 is an apocalyptic number.

It is an amenable number.

61224981 is a deficient number, since it is larger than the sum of its proper divisors (20865099).

61224981 is a wasteful number, since it uses less digits than its factorization.

61224981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114195.

The product of its digits is 6912, while the sum is 33.

The square root of 61224981 is about 7824.6393527114. The cubic root of 61224981 is about 394.1330792349.

The spelling of 61224981 in words is "sixty-one million, two hundred twenty-four thousand, nine hundred eighty-one".