61513452 has 192 divisors, whose sum is σ = 214502400. Its totient is φ = 14722560.

The previous prime is 61513421. The next prime is 61513483. The reversal of 61513452 is 25431516.

61513452 is a `hidden beast` number, since 615 + 1 + 3 + 45 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (61513421) and next prime (61513483).

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107824 + ... + 108392.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^61513452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61513452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107251200).

61513452 is an abundant number, since it is smaller than the sum of its proper divisors (152988948).

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

61513452 is a wasteful number, since it uses less digits than its factorization.

61513452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 605 counting only the distinct ones).

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

The square root of 61513452 is about 7843.0511919788. The cubic root of 61513452 is about 394.7511159807.

Adding to 61513452 its reverse (25431516), we get a palindrome (86944968).

The spelling of 61513452 in words is "sixty-one million, five hundred thirteen thousand, four hundred fifty-two".