61315542 has 40 divisors (see below), whose sum is σ = 140332896. Its totient is φ = 20001168.

The previous prime is 61315537. The next prime is 61315559. The reversal of 61315542 is 24551316.

61315542 is a `hidden beast` number, since 613 + 1 + 5 + 5 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3588 + ... + 11640.

Almost surely, 2^61315542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61315542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70166448).

61315542 is an abundant number, since it is smaller than the sum of its proper divisors (79017354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61315542 is a wasteful number, since it uses less digits than its factorization.

61315542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114 (or 8105 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 61315542 is about 7830.4241264442. The cubic root of 61315542 is about 394.3273109639.

Adding to 61315542 its reverse (24551316), we get a palindrome (85866858).

The spelling of 61315542 in words is "sixty-one million, three hundred fifteen thousand, five hundred forty-two".