651552 has 48 divisors (see below), whose sum is σ = 1868832. Its totient is φ = 197120.

The previous prime is 651517. The next prime is 651587. The reversal of 651552 is 255156.

It is an interprime number because it is at equal distance from previous prime (651517) and next prime (651587).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×651552³ = 829790582133325824, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (38934).

2⁶⁵¹⁵⁵² 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 651552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934416).

651552 is an abundant number, since it is smaller than the sum of its proper divisors (1217280).

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

651552 is a wasteful number, since it uses less digits than its factorization.

651552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 633 counting only the distinct ones).

The product of its digits is 1500, while the sum is 24.

The square root of 651552 is about 807.1877105110. The cubic root of 651552 is about 86.6927994829.

The spelling of 651552 in words is "six hundred fifty-one thousand, five hundred fifty-two".