61532381 has 8 divisors (see below), whose sum is σ = 62412000. Its totient is φ = 60659280.

The previous prime is 61532371. The next prime is 61532411. The reversal of 61532381 is 18323516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61532381 is a prime.

It is a super-2 number, since 2×61532381² = 7572467823058322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61532371) 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, 19226 + ... + 22196.

It is an arithmetic number, because the mean of its divisors is an integer number (7801500).

Almost surely, 2^61532381 is an apocalyptic number.

It is an amenable number.

61532381 is a deficient number, since it is larger than the sum of its proper divisors (879619).

61532381 is a wasteful number, since it uses less digits than its factorization.

61532381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259.

The product of its digits is 4320, while the sum is 29.

The square root of 61532381 is about 7844.2578361500. The cubic root of 61532381 is about 394.7916029382.

Adding to 61532381 its reverse (18323516), we get a palindrome (79855897).

The spelling of 61532381 in words is "sixty-one million, five hundred thirty-two thousand, three hundred eighty-one".