61143501 has 16 divisors (see below), whose sum is σ = 88586240. Its totient is φ = 37370160.

The previous prime is 61143479. The next prime is 61143517. The reversal of 61143501 is 10534116.

It is not a de Polignac number, because 61143501 - 2⁵ = 61143469 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 (61143541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15535 + ... + 19068.

It is an arithmetic number, because the mean of its divisors is an integer number (5536640).

Almost surely, 2^61143501 is an apocalyptic number.

It is an amenable number.

61143501 is a deficient number, since it is larger than the sum of its proper divisors (27442739).

61143501 is a wasteful number, since it uses less digits than its factorization.

61143501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34656.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 61143501 is about 7819.4309895286. The cubic root of 61143501 is about 393.9581603299.

Adding to 61143501 its reverse (10534116), we get a palindrome (71677617).

The spelling of 61143501 in words is "sixty-one million, one hundred forty-three thousand, five hundred one".