25151222502 has 48 divisors (see below), whose sum is σ = 62290594080. Its totient is φ = 7184750976.

The previous prime is 25151222489. The next prime is 25151222519. The reversal of 25151222502 is 20522215152.

It is a happy number.

25151222502 is a `hidden beast` number, since 2 + 5 + 151 + 2 + 2 + 2 + 502 = 666.

It is a super-2 number, since 2×25151222502² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830458 + ... + 860210.

It is an arithmetic number, because the mean of its divisors is an integer number (1297720710).

Almost surely, 2^25151222502 is an apocalyptic number.

25151222502 is an abundant number, since it is smaller than the sum of its proper divisors (37139371578).

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

25151222502 is a wasteful number, since it uses less digits than its factorization.

25151222502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36477 (or 36474 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 25151222502 its reverse (20522215152), we get a palindrome (45673437654).

The spelling of 25151222502 in words is "twenty-five billion, one hundred fifty-one million, two hundred twenty-two thousand, five hundred two".